SSTKJ实业有限公司是一家专业的集生产热敏电阻、温度传感器、温度变送器、湿度传感器、湿度变送器、气体传感器、压力传感器、压力变送器、称重传感器、物（液）位传感器、液位变送器、流量传感器、流量变送器、电流（压）传感器、溶氧传感器、霍尔传感器、图像传感器、超声波传感器、位移传感器、速度传感器、加速度传感器、扭距传感器、红外传感器、紫外传感器、火焰传感器、激光传感器、振动传感器、轴角传感器、光电传感器、接近传感器、干簧管、继电器、微型电泵、磁敏（阻）传感器、接近开关、光电开关、色标传感器、光纤传感

MNR （metal oxide non-linear resistor） varistors are ceramic semiconductors with zinc oxide as the primary ingredient.
Varistor voltages extensively range from 8 to 1800V.
Formed-lead and tape-packaged products are available.
Designed to be compliant with the RoHS Directive, they are considerate to environmental hazards.

Protection of semiconductors from instantaneous over-voltage
Protection from lighting surge induced into wiring and communication lines
Protection from on-off surge of relays, etc.
Protection of automotive electronic equipment and semiconductors from over-voltage.（ZM series Thermistors）
Other

For engine control

Water temperature sensors

Senses engine coolant temperature.
For control of air-fuel ratios of engines and cooling fans

Fuel temperature sensors

Senses temperature
of fuel in
a fuel tank
for air-fuel
ratio control.

For automotive air conditioners

Evaporator temperature sensor （Coating type）

Senses evaporator temperature for control of air conditioners for comfort and efficiency.

Evaporator temperature sensors （Bracket type）

Evaporator temperature sensor （Bracket type）

Mounting
brackets are
molded
together.

Evaporator temperature sensors （Fin type）

Evaporator temperature sensor （Fin type）

A type insertable into heat exchangers for direct measurement of fin temperatures.

Outdoor temperature sensor

Senses outdoor temperatures in front of a radiator for control of an air conditioner for comfort and efficiency.

Passenger cabin temperature sensor

Senses passenger cabin temperatures
for control of an air conditioner for
comfort and efficiency.

For hybrid vehicles

Secondary-battery temperature sensors

Monitors heat generated during discharge of secondary batteries for optimal charge control.

Other

ATF temperature
sensors

Senses ATF temperatures for control of gear shifting shocks and for better fuel efficiency.

Radiator temperature sensors

Senses cooling water temperatures of
a radiator for
control of
a cooling fan.

Water temperature sensors for engine control

Zero load resistance	B constant	Thermal time constant	Operating temp. range
R25=2kΩ	B25/50=3500K	12 sec. max. （in stirred water）	-40 to 120℃

・Customized supplies only

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Fuel temperature sensors for engine control

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R25 2.1kΩ	B25/50 3480K	6.5mW/℃ （in water）	60 sec. max. （in stirred water）	-40℃ to +70℃

・Customized supplies only

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Evaporator temperature sensors for automotive air conditioners （Coating type）

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R25 2.1kΩ	B25/50： 3480K	6.5mW/℃ （in water）	60 sec. max. （in stirred water）	-40℃ to +70℃

・Characteristics and connectors may be customized. （Please contact our sales representative.）

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Evaporator temperature sensors for automotive air conditioners （Bracket type）

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R3.2=26.36kΩ	B3.2/25=3500K	1.5mW/℃ （in still air）	3.0 sec. max. （in stirred water）	-30 to 80℃

・Characteristics and connectors may be customized. （Please contact our sales representative.）

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Evaporator temperature sensor for automotive air conditioner （Fin type）

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R0=11.36kΩ	B0/25=3400K	4.5mW/℃ （in still air）	About 3.0 sec. （in stirred water）	-40 to 93℃

・Insulation resistance： 100MΩmin.

・Withstanding voltage： 1500V AC for 1 minute

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Outdoor temperature sensors for automotive air conditioners

Outdoor temperature sensor

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
Customizable		3.5mW/℃ （in still air）	1010 sec. max. （in stirred water）	-30～80℃ -30 to 80℃

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Passenger cabin temperature sensors for automotive air conditioners

Passenger cabin temperature sensor

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
Customizable		5.0mW/℃ （in still air）	100 sec. max. （in still air）	-30 to 80℃

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Secondary-battery temperature sensors for hybrid vehicles

Zero Power resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R25=10kΩ	B25/85=3435K	--	About 30 sec. （in flowing air）	-40 to 85℃

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ATF temperature sensors

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R100=0.1553kΩ	B40/100=3556K	3.5mW/℃ （in still air）	No longer than 12.4 sec. （in stirred water）	-40 to 165℃

・Oil tightness:　No leaks under 98 kPa oil pressure

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Radiator temperature sensors

Zero load resistance	Operating temp. range
（※１）	-40 to 130℃

※１ Characteristics of water temperature sensors are dynamic characteristics. No zero load resistance is specified.

・Dynamic characteristics R80＝51.9+4.9/-4.4Ω R100＝27.4+1.9/-1.2Ω （with a specified measurement circuit）

Reference measurement circuit Radiator temperature sensors

For air conditioners and refrigerators

For air conditioners, coating type

Indoor and outdoor temperatures and air temperatures at suction and exhalation mouths will be detected.

For air conditioners, CAN type

Senses temperatures
of heat
exchangers（piping）
and discharge
pipes.

For air conditioners, contained in connectors

Multiple sensors of such as a coating type and CAN type can be put together into one connector.

For air conditioner compressors

Senses abnormally over-heated temperatures
on compressor
surfaces.

For
refrigerators

Temperature sensors that control inside temperature of refrigerators and heat exchanger temperatures.

For For air conditioners, coating type household appliances

Hot water
supplies
（with-leads type）

Temperature sensors
to control
temperatures
of incoming and
outgoing water and
bath tub water

Hot water supplies（integrated in a connector）

Temperature sensors
to control
temperatures
of incoming and
outgoing water and
bath tub water

For temperature of air discharged from microwave ovens

Temperature sensors to measure temperatures of air discharged from microwave ovens and control microwave oven operation

For surface temperature sensing

Temperature sensors most suitable for sensing surface temperatures of solid objects

For high temperature sensing

Water-resistant temperature sensors usable in temperatures up to as high as 200℃

For air conditioners, coating type

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R25：10KΩ	B25/50：3950K	2.5mW/℃（in still air）	8.0 sec. max.（in stirred water）	-20℃ to 105℃

Characteristics and connectors may be customized. （Please contact our sales representative.）
Insulation resistance：100MΩ, min.
Withstanding voltage：1500V AC for 1 minute or 1800V AC for 1 sec

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For air conditioners, CAN type

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R25：10KΩ	B25/50：3950K	5.0mW/℃（in still air）	10 sec. max.（in stirred water）	-20℃ to 105℃

Characteristics and connectors may be customized. （Please contact our sales representative.）
Insulation resistance：100MΩ, min.
Withstanding voltage：1500V AC for 1 minute or 1800V AC for 1 sec
Up-to-150℃ capable types optionally available depending on applications （cross-linked polyethylene cable used）

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For air conditioners, contained in connectors

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R25：10KΩ	B25/50：3950K	2.5mW/℃（in still air）	8.0 sec. max.（in stirred water）	-20℃ to 105℃
R25：10KΩ	B25/50：3950K	5.0mW/℃（in still air）	10 sec. max.（in stirred water）	-20℃ to 105℃

Characteristics and connectors may be customized. （Please contact our sales representative.）
Insulation resistance：100MΩ, min.
Withstanding voltage：1500V AC for 1 minute or 1800V AC for 1 second

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For air conditioner compressors

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R25：45KΩ	_	3.0mW/℃（in still air）	_	-30℃ to 130℃

Most suitable for sensing compressor surface temperatures.
Insulation resistance：100MΩ, min.
Withstanding voltage：1500V AC for 1 minute or 1800V AC for 1 second

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For refrigerators

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R0：6.35ＫΩ	B0/25：3830K	7.0mW/℃（in still air）	15 sec. max.（in stirred water）	-30℃ to 80℃

Sensing temperatures of refrigerators, freezers, ice trays, etc.
Characteristics and connectors may be customized. （Please contact our sales representative.）
Insulation resistance：100MΩ, min.
Withstanding voltage：1500V AC for 1 minute or 1800V AC for 1 second

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For hot water supplies（with-leads type）

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R50 3.485KΩ	B0/100 3450K	3.5mW/℃（in still air）	2.0 sec. max. （90％ response in water）	-20℃ to +120℃

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Hot water supplies（integrated in a connector）

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R50 3.485kΩ	B0/100 3450K	3.5mW/℃（in still air）	2.0 sec. max. （90％ response in water）	-20℃ to +120℃

Insulation resistance：100MΩ, min. between protective tube and terminals （with 500V DC megohm meter）
Withstanding voltage：No abnormalities to be observed with 1 minute application of 750V AC between protective tube and terminals.

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For temperature of air discharged from microwave ovens

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R120 1.62kΩ	B25/120 4 250K	9.0mW/℃（in still air）	120 sec. max. （in still air）	-20℃ to +120℃

Upper temperature limit：150℃ for 1h

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For surface temperature sensing

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R25 10kΩ	B25/50 3950K	About 3.5mW/℃（in still air）	15 sec. max. （on an aluminum plate）	-20℃ to +105℃

Characteristics and connectors may be customized. （Please contact our sales representative.）
Insulation resistance 100MΩ, min. between terminal board and terminals （500V DC megohmmeter）
Withstanding voltage: No abnormalities observed between terminal board and terminal （1800V AC for 1 sec.）

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For high temperature sensing

Zero load resistance	B constant	Dissipation constant	Thermal time constant	Operating temp. range
R100 3.3kΩ	B0/100 3970K	4.2mW/℃（in water）	8.0 sec. max. （in stirred water）	-40℃ to +200℃

Every product introduced here will be available on a customization basis only.
Wind speed, flow volume of liquids and gases and humidity can be measured, taking advantage of self-heating characteristics of NTC thermistors.

Flow volume sensor

Senses wind speed and
flow volume and
converts them
into electrical
signal.

Absolute humidity sensor

Senses moisture volume in air （absolute humidity）. For microwave ovens and cloth dryers.

Water level sensor

Senses
water levels.
For dish
washers,
etc.

Flow volume sensor

Cooling efficiency of temperature of self-heated thermistors depends on wind speed （flow volume）. Therefore, thermistor temperatures vary depending on wind speed （flow volume）, causing resistance to accordingly change. This characteristic is used for conversion of wind speed （flow volume） into electrical signals.

Flow volume measurement range	Output voltage	Measurement accuracy	Operating temp. range
0 - 5.0 liter/min.	0.5V to 4.5V non-linear analog output	±5%	5℃ - 45℃

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Absolute humidity sensor

Thermistors, made self-heated, will be cooled by humidity. The resulting temperature difference will be converted into electrical signals. Applications under high temperature and humidity are possible.

Humidity measurement range	Output characteristics （40℃, 35g/m³）	Response time （90% response）	Max. operating temperature
0～130 g/m³	5.5mV±1mV	40 sec. max.	200℃ （sensor section）

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Water/liquid level sensors

Thermistors shall be made self-heated. Their temperature will vary depending on whether there is water. The presence of water will be determined using such characteristics （change in dissipation constant） of thermistors. The reference thermistors can be used for temperature compensation and temperature measurement of water level sensors.

	Zero load resistance	B constant	Dissipation constant	Operating temp. range
Reference value	20KΩ	3950K	About 2.3mW/℃ in air	0 to 80℃
For water level detection	2KΩ	3500K	About 5mW/℃ in water0 to 80℃	0 to 80℃

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