catastrophic failure avoid on a cement crusher planetary gearbox - bearing news

catastrophic failure avoid on a cement crusher planetary gearbox - bearing news

Introduction In a perfect world, the easiest solution to ensure maximum production uptime is for all industry experts to live onsite around the clock! With the aim of ensuring that dedicated experts are always in the neighborhood, I-care has developed its own condition monitoring remote diagnosis solution. Wi-care wireless condition monitoring system performs online, real-time analysis of a particular machine to predict eventual failure. The system performs the onsite data collection while certified analysts analyze your data to deliver comprehensive recommendations 24/7. This wireless and remote strategy offers cost savings over routine-based maintenance and very flexible solution for troubleshooting and monitoring.

*For customer, continuous surveillance of its critical asset with low upfront investment and lower cost than manual/classic online monitoring. *For analyst, continuous data (historic and change follow-up) from office without any travel or measurement time spent.

Equipment, plant overview, Context The plant is a cement industry producing close to full capacity, established for many years in Western Europe. The Equipment is a huge cement ball mill. The suspected mechanical assembly is the gearbox and its electrical drive 1MW. Customer requests I-Care support after a suspected increase in vibration level. In order to do a close monitoring and diagnostic of the vibration on the complete assembly, the analyst decide to install Wi-care wireless system.

Note on the right side of the picture the Wi-care speed sensor directly measuring with a keyphasor on the shaft. Standard spectrum collected via Wi-care in vertical direction. Display in speed units. The dominant frequency appear at 373,9 Hz and its harmonics.

Calculate Gear mesh frequency of 373,71 Hz and its harmonics match the measured frequency of 373,9 Hz. Detected 5Hz modulation are linked to a ring defect (5.01 calculated). Amplitude trend indicate a 100% growth in a few days. Decision was taken by customer based on analyst recommendations via Wi-care measurement to start the maintenance process. Root cause of gear defect is an excessive looseness in the gear assembly due to structural cracks.

The Wi-care system is the latest wireless condition monitoring system from I-Care. The system has been designed to detect, measure and analyze the root causes of excessive levels of vibration and temperature. The Wi-care system is a cost-effective tool used to report any vibration or temperature deviation in a short time. The I-CARE team of engineers using the data from Wi-care is able to give you a condition monitoring remote diagnosis at any time 24 hours a day/7 days a week. The condition based maintenance partnership has been created to give you the chance to correct a potential problem before it occurs.

The solution developed in the Wi-care system is based on a receiver connected on the internet and able to manage up to 144 transmitters, each transmitter sending vibration and temperature data. In order to reach long distance data transfer and remote locations, the WI-care involves a range extender in its network. Using a web-based portal to manage the system avoids any extra cost and any difficulties linked to software. We all know how frustrating it is when you are waiting for your data analysis and you cant take any quick condition based maintenance decision due to software issues. www.wirelessvibration.eu

Added values? Online monitoring based on permanent wired sensors can be expensive in many applications. Wireless monitoring with wireless vibration sensors improves the reliability of difficult-to-monitor assets with quick and cost effective installation. Wireless vibration added values result in a more flexible system, cutting expense and labor costs on installation and maintenance of the old wired vibration and temperature sensors. Consider that you fix the sensors using extra-strong magnets where you need them and in minutes they create a large network of real time data transmission to the gateway data manger in accordance with the range extender. The solution created by Wi-care is very flexible and cost effective because it allows the reuse of existing piezoelectric vibration sensors and turns them into wireless vibration sensors with one action plugging the transmitter.

fault detection for mining and mineral processing equipment

fault detection for mining and mineral processing equipment

Fault detection is a technique being applied in the mining commodities industry to lower operating costs and improve machine reliability and efficiency.The mining, aggregates and cement industries are looking to contain and reduce costs in the face of long-term market price declines in their products. Over the past seven years, for example, the average U.S. price of coal has dropped by 30 percent, while operating and environmental costs have increased. The mining and mineral processing industry has looked to consolidation, improved machine reliability and efficiency and has reduced expenses to sustain profitability. Condition monitoring and fault detection can support these actions by extending equipment performance, preventing unplanned downtime and reducing maintenance and repair time. Though well established in process industries such as pulp and paper, steelmaking and petrochemicals, such technology is not well applied in the mineral processing section of the mining, aggregates and cement industries. This is partly related to the traditionally high cost of condition monitoring and the harsh machine environment. Also, high vibration in vibrating screens, grinding mills and crushers has been a deterrent to widespread condition monitoring. SKF, through the development of its SKF Copperhead fault detection and bearing system for vibration screens, has helped overcome these disadvantages. It detects process faults that may cause damage and affect operation of equipment. The first application was for vibrating screens that are used widely in the mineral processing industry. The bearing system extends the service life and improves the performance of the vibrating screens. The SKF Copperhead concept uses a specially developed vibration and temperature sensor permanently mounted on the vibrating screen. The sensor is designed to operate in harsh environments and is linked to either a periodic or continuous monitoring system.

Acceleration enveloping The system applies the SKF acceleration enveloping technology. This technique can differentiate between normal vibrations due to the passage of minerals through the machine and abnormal vibrations due to machinery process faults such as a loose mesh or bottoming out in a vibrating screen. The main focus of the fault detection system is continuous monitoring and the detection of process faults. Such systems can also detect machinery faults such as gear, lubrication and bearing faults. Here, the system alerts the machine operator to abnormal vibrations so that they can be investigated and eliminated before damage results. The rugged accelerometer and temperature sensor can withstand the high vibration in the vibrating screen. The accelerometer/temperature sensor is also suitable for mills, crushers and other mining applications. In addition to these performance benefits, safety in the mining and quarrying operation can also be improved. Some practical examples demonstrate the effectiveness of this technique. Condition monitoring and fault detection are two approaches to identifying potential problems early. Generally, condition monitoring is a relatively high-cost, high-skill approach using sophisticated instruments that has value in industries such as paper mills. Fault detection usually has a lower overall cost than condition monitoring and can be implemented immediately without much training. It is not dependent on the development or skill of a specialist and is a valuable tool in price-sensitive applications. Fault detection can be either periodic or continuous. It does not generally include the determination of the root cause of the fault. Fault detection can be tuned to include the machinery process and condition faults.

Vibrating screens and feeders Vibrating screens and feeders are key components in the mining and mineral process, waste management and construction industries. The screen sorts or cleans material for the metals, aggregates, cement and mineral process. Usually, the screen (and feeder) is made of a structural frame supported on springs or other elastic material. Additionally, the screen frame includes a mesh (cloth) or grating that sorts or sifts the material. Material (stone, ore, cement) is dropped into the top of the screen onto the mesh. The sorting and sifting process is sped up by the vibration of the screen frame. To obtain the desired vibration, a rotating unbalanced mass is employed. One or two unbalanced shafts supported on bearings or vibratory gearboxes are used. Oversized or dirty material is separated for re-processing or is discarded. Malfunction or loss of screen and feeder use can severely interrupt the processing of material as well as the productivity of the plant. Costs of a new screen can range from 25,000 to 150,000 US dollars. Downtime costs for a vibrating screen can vary from USD 100 to 15,000 per hour, depending on the type of process. Screen repair can take from one to 48 hours, depending on the problem and the maintenance setup. Screens or feeders are normally designed for vibrations in the range of 2 to 10 g acceleration, which corresponds to the 3 to 20 mm stroke or displacement of the screen. The vibration is generally sinusoidal, owing to the rotational unbalance of the eccentric mass. Additional vibrations occur in the screen, due to the loading and sorting/screening of the material in the machine. The high vibration in the screen and the abrasive characteristic of the sorted material cause high stresses and wear in the screen frame. The dusty and sometimes wet conditions make it difficult to keep the screen bearings clean. Bearings with special cages for vibrating applications and other features are needed because of the high acceleration forces in the screen. The SKF Copperhead bearing system includes the SKF Explorer-quality bearing for vibrating applications and the SKF CARB toroidal bearing. The bearing system virtually eliminates the possibility that parasitic forces can be applied to the bearings, resulting in long service lives and cool operating temperatures. The SKF Explorer bearings for vibrating applications are denoted with the VA405 and VA406 suffix. Typical process and machinery faults for vibrating screens and feeders include:

Fault detection The technique for the detection of process and condition faults includes the permanent mounting of special heavy-duty vibration and temperature sensors on the screen, which are monitored by a demodulating filter module. The sensors measure the overall vibrations in the screen. The demodulating filters evaluate signals in the frequency range of 200 to 12000 Hz, with the observed normal vibrations demodulated from the spectrum. A fault is detected as repetitive high frequency bad vibration in the screen, and the overall value of the demodulated signal increases. This increase in vibration trips an operator alarm so the cause of the fault can be investigated. Often, the operator can determine the cause of the fault without specialized instruments. The fault can be rectified, thus reducing the period that the screen operates with the fault and reducing the wear and tear on the screen. If the operator cannot locate and eliminate the source of the fault, a condition-monitoring specialist can be contacted to make further measurements. The fault detection system works using electronic filtering. The filter looks at vibrations in the frequency range where the faults occur and ignores frequencies that are uninteresting. The important frequencies are further processed and compared to an alarm set point in the system. If the overall bad-vibration level exceeds the alarm point, the operator is alerted. A limiting factor to permanent and continuous monitoring is improper installation of temporary sensors for example, because of a poor mounting surface or debris between the sensor base and the screen. Protective guards can also hamper correct placement of the sensor, or the rotating shafting itself can make the sensing location less than optimum for good measurements. Mounting the temporary sensor can expose the worker to hazards from falling rock and debris. The repeatability of the measurements from one time to the next may be unreliable. Permanently mounting the sensors avoids the need for workers to access screens located in difficult positions.

System specification The sensors for mining and mineral applications have to be rugged, with high shock and over-voltage protection. A sensor should have an integral cable for connection to the monitoring system that is also abrasive-resistant and has a high fatigue resistance. An integral cable avoids a cable connector, which can become damaged by vibration. Performance at the connecting point can also be affected by dirt and moisture near the screen. The sensitivity of the sensor should be high enough to detect the various vibration levels in the screen. Periodic monitoring can be performed with a portable data logger/spectrum analyzer. This logger, if fitted with the correct demodulating filter, can evaluate the screen vibration signal and determine if faults exist, while the analyzer can determine the type of fault. In operation, a continuous monitoring system filters and demodulates the vibration signal, has alarm setting capabilities and can provide an output signal for monitoring. The continuous fault detection system should have a 4 to 20 mA output signal that can be continuously monitored by the plants programmable logic controller (PLC) or distributed control system (DCS). The PLC or DCS can also monitor the temperature output signal from the sensor. Continuous monitoring by the PLC or DCS reduces the need for operators to make periodic measurements on the screen. The system can also trip an alarm to alert the operator to a fault in the screen. With this information, a decision can be made to shut down the screen or stop the feed to the screen. The fault detection system was first evaluated at a copper mine in Arizona in the United States. It was able to detect the loose mesh and bottoming out on an operating screen. As the screen was used for production, limited time was available for field-testing. To support this, a vibrating screen test rig was developed in the SKF laboratory. Most screen faults could be reproduced on the test rig. The system was refined before use in other mines and quarries.

Installation on vibrating screens The fault detection system must be installed so that the components are securely attached to the vibrating screen and protected from mechanical damage. Sensors should be located close to the screen bearing housings and oriented in the direction of the screen stroke, plus/minus 45. Also, the sensors must be protected from impact from falling stone or debris, and the sensor cable should be protected from mechanical damage and abrasive wear. The sensor cable must pass from the moving screen structure to the stationary frame without damage from the motion of the screen or stress in the cable. A large radius for the sensor cable must be provided between the moving and stationary parts of the screen. Fault detection based on the SKF Copperhead design has been applied to a number of vibrating screens worldwide. As an example, three cases demonstrating benefits to the screen operator are given. One is in a copper mine and two others are in aggregates plants. A fault detection system was installed on a vibrating screen at the copper mine in October 2000. The screen had recently been rebuilt after a failure on one of the two exciter mechanisms. The new mechanism had a normal vibration level, whereas the original mechanism had had a high vibration level. The fault detection system was set to alarm if the vibration in the mechanisms exceeded 33 gE vibration. In January 2001, the system alarmed high vibration in the original mechanism. The vibration level was in the range of 49 gE. The customer was advised to remove the screen from service to avoid an unplanned or catastrophic failure. In August 2000, a fault detection system was installed on a vibrating screen at a major aggregates plant in the United States. During installation, it was noted that the drive side bearing had a slightly higher vibration level than the vibration level in the opposite bearing. This was likely due to a slight mechanical looseness. In December 2000 the vibration had increased significantly as indicated by the sharp increase in overall acceleration value, gE. The screen was taken out of service as part of the plants overall reconstruction. Because of the value found with this initial detection system, the customer will install another fault detection system on the two new screens that will be part of the reconstructed plant. The third system was a periodic fault detection system that was installed on a vibrating screen at an aggregates plant in Australia. The sensors were mounted on the screen, and a data logger/analyzer analyzed the machine periodically. Using the technique, a fault was observed in one of the spherical roller bearings as an increase in overall vibration level. The bearing was replaced in a planned way, with a minimum of costs.

Conclusion Fault detection based on SKF Copperhead is an alternative approach to monitoring machinery and has a lower cost than condition monitoring. It has been proven to be an effective way to improve the performance and reliability of the vibrating screen in the minerals-processing sector. The ability to detect process and machinery faults and to alert the screen operator means that faults can be eliminated and scheduled maintenance or repair can be planned more efficiently. Thus, the reliability and safety of the monitoring is improved, providing that the system is properly installed. The SKF Copperhead bearing system extends the service life and performance of the vibrating screen. SKF Copperhead is being developed for use in other mineral-processing equipment applications.

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catastrophic failure avoid on a cement crusher planetary gearbox - russia

catastrophic failure avoid on a cement crusher planetary gearbox - russia

Introduction In a perfect world, the easiest solution to ensure maximum production uptime is for all industry experts to live onsite around the clock! With the aim of ensuring that dedicated experts are always in the neighborhood, I-care has developed its own condition monitoring remote diagnosis solution. Wi-care wireless condition monitoring system performs online, real-time analysis of a particular machine to predict eventual failure. The system performs the onsite data collection while certified analysts analyze your data to deliver comprehensive recommendations 24/7. This wireless and remote strategy offers cost savings over routine-based maintenance and very flexible solution for troubleshooting and monitoring.

*For customer, continuous surveillance of its critical asset with low upfront investment and lower cost than manual/classic online monitoring. *For analyst, continuous data (historic and change follow-up) from office without any travel or measurement time spent.

Equipment, plant overview, Context The plant is a cement industry producing close to full capacity, established for many years in Western Europe. The Equipment is a huge cement ball mill. The suspected mechanical assembly is the gearbox and its electrical drive 1MW. Customer requests I-Care support after a suspected increase in vibration level. In order to do a close monitoring and diagnostic of the vibration on the complete assembly, the analyst decide to install Wi-care wireless system.

Note on the right side of the picture the Wi-care speed sensor directly measuring with a keyphasor on the shaft. Standard spectrum collected via Wi-care in vertical direction. Display in speed units. The dominant frequency appear at 373,9 Hz and its harmonics.

Calculate Gear mesh frequency of 373,71 Hz and its harmonics match the measured frequency of 373,9 Hz. Detected 5Hz modulation are linked to a ring defect (5.01 calculated). Amplitude trend indicate a 100% growth in a few days. Decision was taken by customer based on analyst recommendations via Wi-care measurement to start the maintenance process. Root cause of gear defect is an excessive looseness in the gear assembly due to structural cracks.

The Wi-care system is the latest wireless condition monitoring system from I-Care. The system has been designed to detect, measure and analyze the root causes of excessive levels of vibration and temperature. The Wi-care system is a cost-effective tool used to report any vibration or temperature deviation in a short time. The I-CARE team of engineers using the data from Wi-care is able to give you a condition monitoring remote diagnosis at any time 24 hours a day/7 days a week. The condition based maintenance partnership has been created to give you the chance to correct a potential problem before it occurs.

The solution developed in the Wi-care system is based on a receiver connected on the internet and able to manage up to 144 transmitters, each transmitter sending vibration and temperature data. In order to reach long distance data transfer and remote locations, the WI-care involves a range extender in its network. Using a web-based portal to manage the system avoids any extra cost and any difficulties linked to software. We all know how frustrating it is when you are waiting for your data analysis and you cant take any quick condition based maintenance decision due to software issues. www.wirelessvibration.eu

Added values? Online monitoring based on permanent wired sensors can be expensive in many applications. Wireless monitoring with wireless vibration sensors improves the reliability of difficult-to-monitor assets with quick and cost effective installation. Wireless vibration added values result in a more flexible system, cutting expense and labor costs on installation and maintenance of the old wired vibration and temperature sensors. Consider that you fix the sensors using extra-strong magnets where you need them and in minutes they create a large network of real time data transmission to the gateway data manger in accordance with the range extender. The solution created by Wi-care is very flexible and cost effective because it allows the reuse of existing piezoelectric vibration sensors and turns them into wireless vibration sensors with one action plugging the transmitter.

temperature sensors

temperature sensors

Thermometrics, Inc., offers one of the most comprehensive ranges of temperature measurement and sensor products in the world today. From chips to value-added assemblies, with temperature ranges from -196C to 1150C, Thermometrics products play a vital role in measurement, control and protection of industrial and consumer-based applications worldwide.

The Thermometrics temperature sensor product line contributes more than 70 years of technology experience in the design and manufacture of high quality sensors to the Amphenol Advanced Sensors portfolio of sensor-based solutions. Thermometrics continues to invest in leading edge temperature sensor and sensor packaging technology, particularly in developing custom solutions for industry and specific customer application needs.

Thermometrics A-2130 NTC Inrush Current Limiter Kit consists of 32 our most popular styles of Inrush Current Limiters (straight and kinked leads) at a quantity of 5 pieces per style. This kit allows customers, in their initial design stage, to test multiple spec variances to determine which part(s) are best suited for their needs.

Thermometrics ZTP-135SR Thermopile Infrared (IR) Sensors consist of thermo-elements, flat infrared filter and a thermistor for temperature compensation, all in a hermetically-sealed TO-46(18) package. There are also a variety of filters available to help maximize performance in specific applications. Thermopile IR Sensors are used for non-contact, infrared, surface temperature measurement.

Thermometrics ZTP-015 Thermopile Infrared (IR) Sensors consist of thermo-elements, flat infrared filter and a thermistor for temperature compensation, all in a hermetically-sealed TO-46 (18) package. There are also a variety of filters available to help maximize performance in specific applications. Thermopile IR Sensors are used for non-contact surface temperature measurement.

Thermometrics ZTP-101T Thermopile Infrared (IR) Sensors consist of thermo-elements, flat infrared filter and a thermistor for temperature compensation, all in a hermetically-sealed TO-46 (18) package. There are also a variety of filters available to help maximize performance in specific applications. Thermopile IR Sensors are used for non-contact, or infrared, surface temperature measurement.

Thermometrics ZTP-115 Thermopile Infrared (IR) Sensors consist of thermo-elements, flat infrared filter and a thermistor for temperature compensation, all in a hermetically-sealed package. There are also a variety of filters available to help maximize performance in specific applications. Thermopile IR Sensors are used for non-contact surface temperature measuring.

Thermometrics ZTP-115M is a single Thermopile Infrared (IR) Sensor Module used for non-contact surface temperature measurement. It consists of a thermopile, IR sensor, signal conditioning and voltage output.

Thermometrics ZTP-115ML Thermopile Infrared (IR) Sensor Module presents temperature-compensated single outputs via IC with optics (silicon lens). It can also provide compatibility with the customers device without the need for recalibration. The ZTP-115ML uses 4-wire connections: two signals for I2C output, single power supply and ground. The field of view of each element of ZTP-115ML is approx 5 degrees for 50% normalized output with a total size is only 30 mm X 28 mm.

Thermometrics ZTP-135 Thermopile Infrared (IR) Sensors consist of thermo-elements, flat infrared filter and a thermistor for temperature compensation, all in a hermetically-sealed TO-46 (18) package. There are also a variety of filters available to help maximize performance in specific applications. Thermopile IR Sensors are used for non-contact surface temperature measuring.

Thermometrics ZTP-135BS Infrared (IR) Sensors consist of thermo-elements, flat infrared filter and a thermistor for temperature compensation, all in a hermetically-sealed TO-46 (18) package. There are also a variety of filters available to help maximize performance in specific applications. Thermopile IR Sensors are used for non-contact, or infrared, surface temperature measuring.

Thermometrics ZTP-135H Thermopile Infrared (IR) Sensors consists of thermo-elements, flat infrared filter and a thermistor for temperature compensation, all in a hermetically-sealed TO-46 (18) package. There are also a variety of filters available to help maximize performance in specific applications. Thermopile IR Sensors are used for non-contact, or infrared, surface temperature measuring.

Thermometrics ZTP-135L Thermopile Infrared (IR) Sensors consist of thermo-elements, flat infrared filter and a thermistor for temperature compensation, all in a hermetically-sealed TO-46 (18) package. There are also a variety of filters available to help maximize performance in specific applications.

Thermometrics ZTP-148SR Infrared (IR) Sensors consist of thermo-elements, flat infrared filter and thermistor for temperature compensation, all in one hermetically-sealed TO-46 (18) sensor package. There are a variety of filters available to maximize performance in specific applications. Thermopile IR Sensors are used for non-contact surface, or infrared, temperature measurement.

Thermometrics Thermopile Infrared (IR) Sensors are used for non-contact surface temperature measurement.The ZTP-148SRC1 Model consists of thermo-elements, flat infrared filter and thermistor for temperature compensation, all in one hermetically-sealed TO-46 (18) sensor package.

Thermometrics ZTP-188MA Thermopile Infrared (IR) Sensor Module presents temperature-compensated 8 linear array outputs via I2C with optics (silicon lens). It can also provide compatibility with the customers device without the need for recalibration. The ZTP-188MA uses 4-wire connections: two signals for I2C output, single power supply and ground. The sensor is fully-calibrated with a wide object and ambient temperature range.

Thermometrics ZTP-188ML Thermopile Infrared (IR) Sensor Module presents temperature-compensated 8 linear array outputs via I2C with optics (silicon lens). It can also provide compatibility with the customers device without the need for recalibration. The ZTP-188ML uses 4-wire connections: two signals for I2C output, single power supply and ground. The sensor is fully-calibrated with a wide object and ambient temperature range.

Thermometrics ZTP-315 Infrared (IR) Sensors consist of thermo-elements, flat infrared filter and a thermistor for temperature compensation, all in a hermetically-sealed TO-46 (18) package. Thermopile IR Sensors are used for non-contact, or infrared, surface temperature measuring. There are also a variety of filters available to help maximize performance in specific applications.

Thermometrics ZTP-315MIH Thermopile Infrared (IR) Sensor Module presents temperature-compensated single outputs via voltage output with optics (glass lens for high temperature detection). It can also provide compatibility with the customers device without the need for recalibration. The ZTP-315MIH uses 3-wire connections for output signal, single power supply and ground. The field of view is approx 9 degrees for 50% normalized output with a total size is only 33 mm X 17 mm.

Thermometrics RL Series of NTC Type Cryogenic Thermistor Probes are used in liquid level detection in various cryogenic liquids. For use in the range of 25C/77F (room temperature) to -196C/-320.8F (the boiling point of Liquid Nitrogen).

Thermometrics Epoxy Type 65 NTC Interchangeable Thermistors are epoxy-coated interchangeable chip thermistors with heavy isomid insulated nickel lead wires. They provide accurate temperature measurement, control and compensation with use over a range of -40C to 105C (-40F to 221F) and high sensitivity greater than -4%/C at 25C (77F).

Thermometrics Type 95 of NTC Thermistors are epoxy-coated interchangeable NTC thermistor chips with bare tinned-copper, bare tinned-alloy or PTFE insulated lead wires. They are suitable for temperature measurement, control and compensation for use over a range of -112F to 302F (80C to 150C) with interchangeability down to 0.18F (0.1C).

Thermometrics Epoxy Type SC NTC Interchangeable Thermistors are sleeved interchangeable chip thermistors with heavy isomid insulated nickel lead wires. They provide accurate temperature measurement, control and compensation with use over a range of -40C to 105C (-40F to 221F) and high sensitivity greater than -4%/C at 25C (77F), making them ideal for medical applications.

Thermometrics Epoxy Type C100 NTC Thermistors are epoxy-coated chip thermistors with 0.3 mm (0.012 in) bare tinned-copper lead wires. They are used for temperature measurement, control and compensation with a range of -80C to 150C (-112F to 302F) and high sensitivity greater than -4% /C at 25C (77F).

Thermometrics Epoxy Type MS NTC Thermistors are epoxy-coated chip thermistors with 0.254 mm (0.01 in) nickel PTFE lead wires. They are used for temperature measurement, control and compensation with a range of -50C to 150C (-58F to 300F).

Thermometrics Epoxy Type NDK NTC Thermistors are epoxy-coated chip thermistors with 0.2 mm (0.007 in) tinned monel lead wires. Designed for accurate temperature measurement, control and compensation, with operation up to 155C (311F), they are used in automotive, HVAC and white goods applications.

Thermometrics Epoxy Type NDL NTC Thermistors are epoxy-coated chip thermistors with bare 0.0098 in (0.25 mm) tinned copper lead-wires. Designed for accurate temperature measurement, control and compensation, with operation up to 155C (311F), they are used in automotive, HVAC and white goods applications.

Thermometrics Type NDM of Epoxy NTC Thermistors are epoxy-coated chip thermistors with bare 0.007 in (0.2 mm) tinned copper lead-wires. Designed for accurate temperature measurement, control and compensation, with operation up to 155C (311F), they are used in automotive, HVAC and white goods applications.

Thermometrics Epoxy Type NDP NTC Thermistors are epoxy-coated chip thermistors with PFA/PTFE insulated 0.25 mm (0.0078 in) nickel lead wires. Designed for accurate temperature measurement, control and compensation, with operation up to 155C (311F), they are used in automotive, HVAC and white goods applications.

Thermometrics Epoxy Type NK NTC Thermistors are epoxy-coated chip thermistors with tin-coated steel wires and epoxy resin coating. Designed for accurate temperature measurement, control and compensation. With operation up to 155C (311F), they are used in automotive, HVAC and white goods applications.

Thermometrics Epoxy-Coated Type NKI of Noise Immune Thermistors are newly developed, consisting of a noise immune NTC thermistor with an integrated radio frequency (RF) decoupling function, providing protection from electromagnetic interference (EMI) at the component level over a wide frequency range.

Thermometrics BR Series of Glass-Encapsulated Bead Thermistors consists of glass-encapsulated bead thermistors on fine diameter (alloy or platinum) lead wires. Rugged glass encapsulation provides hermetic seal and better strain relief than glass-encapsulated bead thermistors. Suitable for self-heated applications, such as liquid level sensing or gas flow measurement. Recommended for applications where the customer will perform further assembly operations.

Thermometrics Diode Series of Glass-Encapsulated NTC Thermistors consists of a range of NTC chip thermistors in DO-35 style glass package (diode outline) with axial solder-coated copper-clad steel wires. Designed for accurate temperature measurement, control and compensation in various applications. Glass body provides hermetic seal and voltage insulation and excellent stability.

Thermometrics FP Series of Glass-Coated Fastip Probe NTC Thermistors consists of small diameter glass-coated thermistor beads hermetically sealed at the tips of shock resistant glass rods. The units are rugged and unaffected by severe environmental exposures, including high density nuclear radiation. The FP Series of Fastip Thermoprobes are ideally suited for high speed measurement and control of fluid temperatures, fluid levels or flow.

Thermometrics GC Series of Glass-Encapsulated NTC Chip Thermistors consists of small glass-encapsulated chip thermistors on fine diameter platinum alloy lead wires. Suitable for temperature measurement, control and compensation applications, as well as self-heated applications, such as liquid level sensing or gas flow measurement.

Thermometrics HTP Series of NTC Type High Temperature Probes consists of a bead thermistor hermetically-sealed in the tip of a shock resistant glass rod. These units are rugged and unaffected by severe environmental exposures. They exhibit excellent stability for all temperatures at or below 842F (450C). Intermittent operations at temperatures up to 1112F (600C) are permissible.

Thermometrics Miniature Series of Glass Bead NTC Thermistors offers a range of miniature thermoprobes consisting of a large bead thermistor hermetically sealed in the tip of a shock resistant solid glass rod. They offer improved, long-term stability and high reliability.

Thermometrics SP Series of Ultra-Stable Probe NTC Thermistors receive additional processing to assure their continuous use in one of three temperature classes and are categorized into one of six stability groups. These thermistors may be used in all temperature measurement and control applications with the added assurance of long term stability and reliability. They are ideal for use as secondary standards in laboratories.

Thermometrics TG Series of NTC Thermistors are glass-sealed radial type thermistors with a water and oilproof design, featuring high temperature resistance and accuracy. For use in a wide variety of applications, including automotive, heating/cooling devices, boiler systems and appliances.

Thermometrics Type B Glass-Coated Bead Thermistors consists of glass-coated bead thermistors on fine diameter platinum alloy lead wires. The special thin glass coatings provide hermetic seal making these thermistors unaffected by severe environmental exposures. They are suitable for most low cost temperature measurement, control and compensation, such as self-heated applications, including liquid level sensing and gas flow measurement.

Thermometrics Type JM of Resin-Coated Glass-Encapsulated Thermistors are glass-encapsulated NTC thermistors housed in a resin tip, which is bonded to 'figure 8' PVC leadout wires. They are resistant to moisture ingress, which makes them suitable for use in air conditioning evaporators to prevent inefficiency due to icing.

Thermometrics Type CR1 are NK format NTC Chip Thermistors consisting of Tin (Sn) coated Alloy 52 leads with a high performance acid and moisture resistant coating. They are ideal for harsh environment applications and high volume assembly.

Thermometrics Type RL10 of Radial Lead NTC Thermistors consist of point-matched disc thermistors with bare lead wires. They are suitable for PCB and probe mountings with high sensitivity to changes in temperature and a wide operating range of -58F to 302F (-50C to 150C).

Thermometrics Type RL14 of Radial Lead NTC Thermistors consist of point-matched disc thermistors with bare lead wires. They are suitable for PCB and probe mountings with high sensitivity to changes in temperature and a wide operating range of -58F to 302F (-50C to 150C).

Thermometrics Type RL20 of Radial Lead NTC Thermistors consist of point-matched disc thermistors with bare lead wires. They are suitable for PCB and probe mountings with high sensitivity to changes in temperature and a wide operating range of -58F to 302F (-50C to 150C).

Thermometrics Type RL30 of Radial Lead NTC Thermistors consist of point-matched disc thermistors with bare lead wires. They are suitable for PCB and probe mountings with high sensitivity to changes in temperature and a wide operating range of -58F to 302F (-50C to 150C).

Thermometrics Types RL35/40/45 of Radial Lead NTC Thermistors consist of point-matched disc thermistors with bare lead wires. They are suitable for PCB and probe mountings with high sensitivity to changes in temperature and a wide operating range of -58F to 302F (-50C to 150C).

Thermometrics Type SA of Interchangeable Radial Lead NTC Thermistors consist of interchangeable thermistors with bare lead wires. They are suitable for PCB and probe mountings with high sensitivity to changes in temperature and a wide operating range of -58F to 302F (-50C to 150C).

Thermometrics Surface Mount Devices (SMD) Series of NTC Thermistors are intended for temperature measurement, control and compensation. They are suitable for standard soldering techniques and availabe in a range of sizes, including 0402, 0603, 0805 and 1206.

Thermometrics Type PRE/K PTC Thermistors consist of thin-film platinum resistance elements. They are especially suited for surface measurment with applications in the automotive and domestic appliance industries with many options for customization.

Thermometrics Type PTO PTC Thermistors consist of a range of radially-wired bare PTC disc thermistors for current regulation, circuit protection and temperature measurement and control. Available in a broad range of resistances, transition temperatures and voltage ratings.

Thermometrics Type YM PTC Thermistors consist of a range of radially-wired PTC disc thermistors with silicone resin coating with a wide range of operating current levels. Designed for general purpose over-current, overvoltage and direct over-temperature protection.

Thermometrics Type YP PTC Thermistors consist of a range of radially-wired PTC disc thermistors with silicone coating, intended for use as a current limiting device. Available in a wide range of operating current and voltage levels with excellent stability and fail-safe operation.

Thermometrics Type YQ RoHS Compliant PTC Thermistors is a range of radially-wired PTC thermistors with green silicone resin coating. Designed for general purpose over-current, over-voltage and direct over-temperature protection, these thermistors offer excellent stability and fail-safe operation.

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