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Welcome to EXSENSE Electronics Technology Co.,Ltd.

EXSENSE customizes silver / gold electrode NTC chip die, high precision / high temperature NTC thermistor & waterproof / fast response temperature sensor. Application: new energy vehicles / smart home / GSM / OA / medical electronic, infrared thermal / thermal printer head / laser printer & copier / IGBT / optical communication devices / smart toilet / coffee maker / medical device.
    EXSENSE Electronics Technology Co.,Ltd.is specialized in a variety of NTC thermistor NTC temperature sensor devices and related materials research, production, development and sale of private high-tech enterprises.Companies in the industry rely on a strong collaborative capabilities, to provide customers with a variety of electronic components supporting services.
    The use of advanced semiconductor manufacturing process combined with independent intellectual property rights of the NTC temperature sensor, NTC thermistor materials and process technology, through Japan, Taiwan, Germany, imported high-precision materials processing, slicing, packaging and testing equipment, we achieved an NTC thermistor NTC resistor temperature sensor devices and high-precision volume manufacturing. At the same time, through innovative management, strengthening quality control, we ensure the continuous production of products with high stability, high reliability. At this stage of the main species produced include: AT Series-- High Precision Dip NTC ThermistorLT Series-Small Size High Precision Dip NTC Thermistor BT Series–Battery Series High Precision NTC ThermistorDT Series—Die (Bare chip)NTC ThermistorIT Series—Electronic Thermometer Series High Precision NTC ThermistorCT Series–Chip Type NTC ThermistorFT Series–Film Type NTC ThermistorGT Series–Glass Sealed NTC ThermistorPT Series–Power Type NTC ThermistorTS Series–NTC Temperature sensor
    The Company in the NTC temperature sensor, NTC thermistors, temperature sensitive components and materials have a number of innovative and independent intellectual property rights, we have continued to strengthen its own R & D capability has been maintained at the same time with the advanced international counterparts in the field close cooperation, and strive to provide customers with the most advanced technology of international standard products and the most internationally competitive quality and service!
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  We always focus on NTC thermistor & temperature sensor.
 
Home >Technique >Main parameter
 
Main parameter
 Basic Characteristics of NTC Thermistor
What is NTC Thermistor?

NTC: Negative Temperature Coefficient

Thermistor:
Thermally Sensitive Resistor

NTC Feature:  Exhibit Decrease in resistance when temperature rises.

 

 

Thermistor is a semiconducting ceramic resistor produced by sintering the materials at high temperature and made mainly from metal oxide. NTC thermistors are resistors with large negative temperature coefficient. Change in resistance of the NTC thermistors can be brought about either externally by a change in ambient temperature or internally by self-heating resulting from a current flowing through the device. At certain measure power, its resistance reduce rapidly while the temperature getting increase. Taking advantage of this characteristic, it can achieve the detecting and controlling temperature purpose.

 1.Zero-power resistance (RT)

The zero-power resistance is the value of a resistance when measured at a specified temperature, under conditions such that the change in resistance due to the internal generation of heat is negligible with respect to the total error of measurement.

 

 2.Rated zero-power resistance R25

The rated zero-power resistance is the nominal value at the standard temperature of 25 unless otherwise specified.

 

 3.B constant in Kelvin’s (K)

B constant is an index of the thermal sensitivity expressed by the formula:

Resistance in ohms ( ) at temperature T1

Resistance in ohms ( ) at temperature T2

T1=2731.5k +( T1),  T2=2731.5k+ (T2)

 4.Dissipation factor(δ)

δ=ΔP/ΔT (mW/)

Dissipation factor (δ) is power in milliwatts required to raise thermistor temperature 1.Measured with thermistor suspended by its leads in a specified environment.

 

 5.Thermal time constant (τ)

Thermal time constant (τ) is the time required by a thermistor to change 63.2% of the difference between its initial and final temperature. Measured with thermistor suspended by its leads in specified environment.

τ=C/δ

 6. Power rating

  Rated power=heat dissipation factorδ × (maximum operating temperature25)

 

7.Resistance/temperature characteristic

The relationship between the zero-power resistance of a thermistor and its body temperature. The resistance law follow approximately the formula:

 

R1 : Resistance value at absolute temperature T1 (K)
B : B constant T(K)=T()+273.15

 

EXSENSE Electronics Technology Co., Ltd.
 

E-mail: sales9@exsense.com.cn
Tel: +86-758-2287899
Fax: +86-758-6620336 / 6198980
Claim email: export@exsense.com.cn
Factory Address: Tangxia Industry Zone, Mugang Town, Duanzhou District, Zhaoqing City, Guangdong Province, China
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