NTC Thermistor can be assembled in housing in a variety of configurations for temperature sensing, measurement, detection, indicator, monitoring and control. Thermistor temperature sensor probe assemblies can conveniently attach to or be an integral part of any system to monitor or control temperature.The choice of assembly is dependent on the application. The primary factors which determine the optimum configuration of a thermistor assembly are the operating environment, mounting, time response and minimum dissipation constant.
The two factors which do vary considerably with thermistor sensor probe assembly design are time constant and dissipation constant. The time constant will typically be of greater duration in encapsulated thermistors. This is, of course, due to additional mass surrounding the thermistor element; therefore, extending the thermal transfer time. Dissipation constant will also be greater in assemblies. The additional housing mass serves well as a heat sink. Greater power is therefore required to induce self-heating. Both time constant and dissipation constant will vary with the selected thermistor and housing. Heat transfer properties of the housing, thermistor location, mass and wire type determine these constants.
Applications for temperature sensing include air temperature sensors, surface temperature sensors and immersion temperature sensors. Housings for air temperature sensors are often simple, inexpensive devices such as molded plastic shells, deep-drawn brass or aluminum cylinders, or even stainless steel tubes. Surface temperature sensors are designed to match the contour of the surface to be sensed, whether it's flat, curved, or round. Mounting holes or clips are often used to simplify installation of the sensor. Immersion temperature sensors are designed so that the sensing element will be surrounded by the medium to be sensed, often times a liquid. The sensing portion will normally protrude through a hole or orifice while a portion of the assembly will remain outside the medium to allow for the signal to be read. Immersion housings are usually threaded to allow them to be screwed into a hole or opening. Immersion part requests to be liquid and humidity prevention.
The material used for the housing will be dependent upon the temperature range needed, response time, cost, and special considerations such as UL, FDA or NSF requirements in food and/or medical applications. Some of the materials available include stainless steel, copper, plastic, teflon, brass, aluminum, epoxy and heat shrinkable tubing.
The following are examples of some NTC thermistor temperature sensor probe assemblies.
Application: Temperature measurement in air conditioner for regulating the evaporator temperature, and other HVAC (Heating, ventilation and air conditioning) application.
Copper (brass) tube NTC thermistor temperature sensor probe features
Copper (brass) tube (pipe) case thermistor temperature sensor probe assembly.
PVC insulated wire.
Moisture resistant.
Small, quick temperature response.
High stability under temperature shock.
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Resistance @25℃
|
Beta Value
(25/50)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
10KΩ±1%
|
3950K±1%
|
5 MW/℃
|
10 sec
|
-30℃～+105℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Application: thermistor air temperature sensor for air conditioning, and other HVAC application.
Epoxy air temperature sensor features
Thermistor temperature probe with epoxy resin encapsulation,
PVC-insulated wires
Moisture resistant.
Small, quick temperature response.
|
Resistance @25℃
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Beta Value
(25/50)
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Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
10KΩ±1%
|
3950K±1%
|
10 sec
|
5 MW/℃
|
-30℃～+105℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Application: Thermistor temperature measurement for refrigerator, freezer, air conditioner, floor heating, and other HVAC application, etc.
ABS Plastic NTC Thermistor Temperature Sensor Features
ABS plastic tube (pipe) case thermistor temperature sensor assembly.
PVC insulated connecting cable.
Withstands freeze/thaw cycling. Moisture resistant.
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Resistance @ 5℃
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Beta value
(5/25)
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Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
5.06KΩ±2%
|
3839K±2%
|
5 MW/℃
|
10 sec
|
-40℃～+80℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Ring lug NTC thermistor surface temperature probes are designed for screw-in-place applications. Most of these temperature probe housings are standard ring terminals or ring lugs with the thermistor potted in the barrel of the lug, popular for temperature measurement, control, and monitoring of small motors, heat exchangers, and fluid pumping systems, semiconductor heatsinks, enclosure panels, etc. They are also easily mounted in instruments where over temperature protection is required.
Ring lug form surface temperature sensor features
Good thermal coupling through metal tag.
Thermistor housed in eyelet nickel plated copper material.
Metal contact surface yields fast temperature response.
PVC insulated leads.
Eyelets to fit screw mounting.
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Resistance @25℃
|
Beta value
(25/50)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
10KΩ±2%
|
3950K±1%
|
5 MW/℃
|
15 sec
|
-30℃～+105℃
|
Note:
1. Alternative ratings on resistance and Beta value upon request.
2. Other ring hole diameter can be offered upon request for M3, M4, M5, M6, M8, M10, M13 screw thread application.
Round ring flat surface temperature measurement probe, PTFE wire cable, used for bread processing machine, induction cooker, and other kitchen cooking utensil, etc.
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Resistance @25℃
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Beta value
(25/50)
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Voltage withstanding
|
Dissipation factor
|
Operating temperature
|
|
100KΩ±1%
|
3950K±1%
|
1500V/2sec.
|
15 sec
|
-30℃～+200℃
|
Note: Alternative ratings on resistance, Beta value and calbe upon request.
NTC Thermistor Surface Temperature Probe, Metal Lug Housing
Surface mount housing, copper lug terminal, with stud mounting hole, jacketed cable, PVC insulation.
Flag terminal thermistor temperature sensor probe, surface mount housing, tin-plated copper flag terminal, with stud mounting hole, applied in industrial equipment, transit, HVAC, power and utilities, computers, home appliances, calibration and instrumentation.
Flag terminal thermistor temperature sensor probe features
Suitable for power supply, motor, heatsink applications.
Copper housing material has excellent thermal transfer characteristics.
Flag terminals are available in several sizes allowing a wide choice of extension wire and cables to be used in the assembly.
Eyelet to fit screw-in-place mounting.
Surface mount housing, copper lug terminal, with stud mounting hole, flying leads, PVC insulation.
Flat disc metal thermistor temperature sensor probe features
Flat Disc,stainless steel, versatile, multi-purpose surface temperature sensor.
Flat Disc Construction Provides Maximum Surface Contact.
Flat disc metal thermistor temperature sensor probe ideally suited for applications such as determining heat loss, compressor efficiency and measureing manufold temperature.
Application: thermistor temperature sensor probe assembly for standard domestic oven, microwave oven, electric cooker, roaster, toaster, industrial process control, etc.
Stainless steel oven cooker roaster toaster thermistor temperature sensor probe features
Glass encapsulated thermistor, housed in stainless steel sheath, with rectangle flange, round tip and 1 mounting hole.
For temperatures upto 300℃.
Reliable operation in hot, damp and fatty air.
|
Resistance @25℃
|
Beta value
(25/50)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
100KΩ±2%
|
3950K±1%
|
15 sec
|
5 MW/℃
|
-30℃～+300℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Flanged stainless steel NTC thermistor temperature sensor probe features
Glass encapsulated thermistor, housed in stainless steel sheath, with rectangle flange and 1 mounting hole.
Diode package thermistor is exposed outside for fast response.
Fibreglass silica gel cable.
For temperatures upto 300℃.
Reliable operation in hot, damp and fatty air.
|
Resistance @200℃
|
Resistance @25℃
|
Beta Value (100/200)
|
Voltage withstanding
|
Insulation resistance
|
Operating temperature
|
|
1KΩ
|
230 KΩ
|
4537k
|
1500V/2 seconds
|
Voltage 500VDC,
≥100MΩ
|
-30℃～+200℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Application: thermistor temperature sensor probe assembly for electric cooker, oven, barbecue fork, fryer,etc.
Bending stainless steel NTC thermistor temperature sensor probe features
Bending stainless steel housing, with pointed penetration tip. Quick temperature response.
Resistant to high temperature.
|
Resistance @25℃
|
Beta value
(25/50)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
100KΩ±3%
|
3990K±1%
|
15 Sec
|
5 MW/℃
|
-30℃～+250℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Application: thermistor temperature sensor probe for temperature measurement of liquid, water, air, etc. Typical application coffee maker, tea kettle, water heater boilers, and other home appliance.
Screw thread water heater boilers thermistor temperature sensor features
Immersion liquid probe.
Screw thread mounting sensor.
Rugged, resistant to heat shock and moisture.
Quick response.
|
Resistance @25℃
|
Beta Value
(25/85)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
10KΩ±2%
|
3435K±1%
|
10 sec
|
5 MW/℃
|
-30℃～+120℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Application: thermistor temperature sensor probe for liquid temperature measurment, control, such as coffee maker, tea kettle, etc.
Coffee maker NTC thermistor temperature sensor probe features
Immersion sensor, can be placed directly in the water flow.
Rugged, resistant to heat shock and moisture.
Quick response.
Precise temperature measurement due to direct water contact.
|
Resistance @25℃
|
Beta Value
(25/50)
|
Voltage withstanding
|
Insulation resistance
|
Operating temperature range
|
|
100KΩ±1%
|
3950K±1%
|
1200VAC/5 seconds
|
Voltage 500VDC,
≥100MΩ
|
-30℃～+125℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Application: thermistor temperature sensor probe for liquid temperature measurment, control, such as coffee maker, tea kettle, water heater, etc.
Water Heater NTC thermistor temperature sensor probe features
Immersion sensor, can be placed directly in the water flow.
Rugged, resistant to heat shock and moisture.
Quick response.
Precise temperature measurement due to direct water contact.
|
Resistance @25℃
|
Beta Value
(25/50)
|
Voltage withstanding
|
Insulation resistance
|
Operating temperature range
|
|
50KΩ±1%
|
3950K±1%
|
1200VAC/5 seconds
|
Voltage 500VDC,
≥100MΩ
|
-30℃～+125℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Closed end flanged stainless steel NTC thermistor temperature sensor probe for fryer, roaster, toaster,standard domestic oven, microwave oven, electric cooker, other application includes automotive engines and exhaust, industrial process control, etc.
|
Resistance @25℃
|
Resistance @200℃
|
Beta Value (25/50)
|
Voltage withstanding
|
Thermal time constant
|
Operating temperature
|
|
1.388MΩ
|
4KΩ
|
4500k
|
1800V/2 seconds
|
20 sec
|
-30℃～+280℃
|
Note: Alternative ratings on resistance and Beta value upon request.
Spherical Ended Stainless Steel Probe, with wide mouth, jacket cable.
|
Resistance @25℃
|
Beta value
(25/50)
|
Thermal time constant
|
Voltage Withstanding
|
Operating temperature
|
|
10kΩ±1%
|
3950K
|
15 sec
|
1500V/ 2Sec
|
-40℃～+105℃
|
Note: Alternative ratings on resistance and Beta value upon request.
Flared stainless steel tube thermistor temperature sensor probe, "bullet" style temperature probe for air, gas or liquid. Typical application coffee maker, tea kettle, water heater boilers, milk warmer, cooking equipment, and other home appliance.
|
Resistance @25℃
|
Beta Value
(25/85)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature range
|
|
10KΩ±2%
|
3977K±1%
|
12 Sec
|
5 MW/℃
|
-30℃～+105℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Application: Aluminum tube thermistor temperature sensor probe assembly for coffee maker, cookie maker, bread maker, roaster, toaster and other food processing, especially for coffee maker heating tray, bake tray.
|
Resistance @200℃
|
Resistance @25℃
|
Beta Value (100/200)
|
Voltage withstanding
|
Insulation resistance
|
Operating temperature
|
|
1KΩ
|
230 KΩ
|
4537k
|
1500V/2 seconds
|
Voltage 500VDC,
≥100MΩ
|
-30℃～+200℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Application: thermistor temperature sensor probe assembly for standard domestic oven, microwave oven, electric cooker, roaster, toaster, industrial process control, etc.
Flanged stainless steel NTC thermistor temperature sensor with 2 mounting holes features
Glass encapsulated thermistor, housed in stainless steel sheath, with rectangle flange and 2 mounting holes.
For temperatures upto 300℃.
Reliable operation in hot, damp and fatty air.
|
Resistance @25℃
|
Beta value
(25/50)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
100KΩ±2%
|
3950K±1%
|
15 sec
|
5 MW/℃
|
-30℃～+300℃
|
Note: Alternative ratings on resistance and Beta value upon request.
Stainless Steel Housing Immersion Penetration Probe.
Pointed tip stainless steel NTC thermistor temperature sensor features
Long stainless steel housing, with pointed tip, for easily penetrating and piercing soft and semi-frozen materials, handling for multi-point temperature sensing. Can be used in food processing, oven, liquid (water) boiler. Also ideal for soil and ground measurements.
Fast response.
Can operate in high temperature media.
|
Resistance @25℃
|
Beta value
(25/50)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
100KΩ±1%
|
3990K±1%
|
15 sec
|
5 MW/℃
|
-30℃～+250℃
|
Note: Alternative ratings on resistance and Beta value upon request.
Meat probe is used to measure the temperature of cooking food. Application inculdes home appliance and microwave oven, etc.
Meat probe features:
Stainless steel housing with sharpen tip for easily penetration into the food.
Optional for straight stainless steel tube, or bending at requested position.
copper braided shield cable.
Phone plug termination.
Reliable operation in hot, damp and fatty air.
|
Resistance @200℃
|
Resistance @25℃
|
Beta Value (100/200)
|
Voltage withstanding
|
Insulation resistance
|
Operating temperature
|
|
0.55KΩ
|
98.63KΩ
|
4300k
|
1500V/2 seconds
|
Voltage 500VDC,
≥100MΩ
|
-40℃～+260℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Threaded stainless steel tube thermistor temperature sensor probe for temperature measurement of liquid, water, air, etc. Ideal for vessel and pipe installation. Typical application coffee maker, tea kettle, water heater boilers, soybean milk cooking equipment, and other home appliance.
Threaded stainless steel NTC thermistor temperature sensor features
Immersion liquid probe.
Screw thread mounting sensor.
Threaded design affords greater resistance to shock and vibration.
Quick response.
|
Resistance @25℃
|
Beta Value
(25/50)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature range
|
|
10KΩ±2%
|
3950K±1%
|
15 seconds
|
5 MW/℃
|
-30℃～+105℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Metal Housing Threaded Fitting NTC thermistor temperature probes consists of a thermistor mounted inside a threaded pipe plug. The temperature probes in this series are widely used for temperature sensing in pipe walls, vessel walls, and equipment casings.Ideal for tanks, vessel and pipe installation. Typical application water heater boilers, coffee maker, tea kettle, roaster, toaster, kitchen appliance, as well as other industrial application.
Metal Housing Threaded Fitting immersion liquid NTC thermistor temperature sensor features
Bolt-mount thermistor sensor.
Screw thread mounting sensor.
Available for chassis mounting.
Threaded hex head design affords greater resistance to shock and vibration.
Metal housings are available in brass or stainless steel.
Available for a variety of thread sizes.
|
Resistance @25℃
|
Beta Value
(25/50)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature range
|
|
10KΩ±2%
|
3380K±1%
|
20 seconds
|
5 MW/℃
|
-30℃～+125℃
|
Note: Alternative ratings on resistance,Beta value and cable length upon request.
Application: silicon tube thermistor temperature sensor probe for home electric appliances, hair beauty appliance, hair curler, hair straightener, other application inculdes motor temperature sensing, induction cooker, etc.
Silicon tube NTC thermistor temperature sensor probe features
Glass encapsulated NTC thermistor housed in silicon tube.
Wire cable in PTFE.
Quick response.
|
Resistance @25℃
|
Beta Value
(25/50)
|
Thermal time constant
|
Dissipation factor
|
Operating temperature
|
|
100KΩ±2%
|
3950K±1%
|
12 sec
|
5 MW/℃
|
-30℃～+200℃
|
Note: Alternative ratings on resistance, Beta value and cable length upon request.
Glass coated NTC thermistor housed in protection tube
Protection tube is available in slica gel.
Cable material is available in either PTFE material, or PVC outside wraped with heat protection tube.
Application: thermistor temperature sensor probe assembly for washing machine, dish washer, tumble dryer, boiler, etc.
Washing machine NTC thermistor temperature sensor features
Resistant to damp corrosive media, such as soapy water.
Excellent dielectric strength.
