OHIZUMI

OHIZUMI MFG.’s thermistors, varistors and thermistor temperature sensors are playing an active role
in comprehensive fields of automotive, household appliances and industrial equipment

Japanese

Thermistor assembles/Car industry

TOP > Product information > Thermistor assemblies > Automotive industry

Every product introduced here will be available on a customization basis only.

For engine control

Water temperature sensors

Water temperature sensors

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

Fuel temperature sensors

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)

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

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

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

Secondary-battery temperature sensors

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

Other

ATF temperature sensors

ATF temperature
sensors

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

Radiator temperature sensors

Radiator temperature sensors

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

Water temperature sensors for engine control

Water temperature sensors for engine control
Zero load resistanceB constant Thermal time constant Operating temp. range
R25=2kΩB25/50=3500K 12 sec. max. (in stirred water) -40 to 120℃

・Customized supplies only

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Fuel temperature sensors for engine control

Fuel temperature sensors for engine controlFuel temperature sensors for engine control
Zero load resistanceB constant Dissipation constant Thermal time constant Operating temp. range
R25 2.1kΩB25/50 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)

Evaporator temperature sensors for automotive air conditioners (Coating type)Evaporator temperature sensors for automotive air conditioners (Coating type)
Zero load resistanceB constant Dissipation constant Thermal time constant Operating temp. range
R25 2.1kΩB25/50: 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.)

PDF catalog

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Evaporator temperature sensors for automotive air conditioners (Bracket type)

Evaporator temperature sensors for automotive air conditioners (Bracket type)Evaporator temperature sensors for automotive air conditioners (Bracket type)
Zero load resistanceB constant Dissipation constant Thermal time constant Operating temp. range
R3.2=26.36kΩB3.2/25=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)

Evaporator temperature sensor for automotive air conditioner (Fin type)Evaporator temperature sensor for automotive air conditioner (Fin type)
Zero load resistanceB 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

Secondary-battery temperature sensors for hybrid vehiclesSecondary-battery temperature sensors for hybrid vehicles
Zero Power resistanceB 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

ATF temperature sensorsATF temperature sensors
Zero load resistanceB 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

Radiator temperature sensorsRadiator temperature sensors
Zero load resistanceOperating 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

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