Patch PT100 temperature thermal resistor temperature sensor price is trustworthy

Temperature of the temperature sensor selection methods

thermistor thermistor is to use semiconductor material, most of the negative temperature coefficient, namely the resistance decreased with increasing temperature. Temperature the temperature sensor ( Figure 6) Temperature changes can cause greater resistance to change, so the temperature sensor is sensitive to temperature. But the poor linearity thermistor, and had a lot to do with production process. Manufacturers to a standardized thermistor curve. Thermistor volume is very small, respond to changes in temperature. But the thermistor need to use a current source, small size also makes it to the thermal error is very sensitive. Thermistor in two line measurement of temperature, have good precision, but its specific heat coupling expensive, measurable temperature range is less than the thermocouple. A common thermistor resistance at 25 ℃ for 5 k Ω, each 1 ℃ temperature change 200 Ω resistance change. Pay attention to the lead resistance 10 Ω only negligible 0. Error of 5 ℃. It is very suitable for the need for rapid and sensitive temperature measurement of current control applications. Size is good to have space requirements, but must pay attention to prevent from thermal error. Thermal resistor and its measurement technique. Thermistor is small size advantage, it can quickly stable, will not result in a thermal load. But also is not very strong, large current will cause self-heating. Because the thermistor is a resistive device, any current source is the fever caused by power. Power is equal to the current square and resistance of the product. So you want to use a small current source. If the thermistor is exposed to high fever, will cause damage.

the temperature of the temperature sensor installation using the

the error of thermal inertia is introduced into because of thermocouple thermal inertia instrument indicated value behind the change of the measured temperature, temperature (temperature sensor Figure 12) This effect is particularly prominent in the fast measurement. So should be used as thermal electrode is small, small thermocouple protection tube diameter. Temperature measuring environmental permits, even protecting tube can be taken. Due to measurement lag, using thermocouples detect temperature fluctuations of the amplitude of the furnace temperature fluctuation amplitude of the small. Measurement lags behind, the greater the fluctuation amplitude of the thermocouple is smaller, and the actual temperature difference. When using the time constant of thermocouple temperature or temperature control, instrument display temperature fluctuation is small, but the actual furnace temperature fluctuations can be quite large. In order to accurately measure temperature, should choose small thermocouple time constant. With thermocouple time constant is inversely proportional to the heat transfer coefficient, heat the density and specific heat is proportional to the diameter, material, such as to reduce the time constant, in addition to the increased heat transfer coefficient, the effective way is to try to decrease the size of the hot end. Use, usually USES the material with good thermal conductivity, thin, small diameter of the tube wall to protect casing. In the precision of temperature measurement, using unprotected casing bare wire thermocouple, thermocouple easy damaged, should be timely correction and replacement.

how to calculate the depth of the temperature of the temperature sensor plug?

temperature inserted depth of the temperature sensor is easy to ignore, in theory, temperature temperature sensor insertion depth can generally be decided according to the actual needs. Insert depth should not be less than the temperature of the temperature sensor protection 8 - the diameter of the casing 10 times, so as to guarantee the stability of temperature temperature sensor performance.

in order to guarantee the accuracy of measurement, the temperature of the temperature sensor is sensitive to all inserted into the tested medium. Temperature temperature sensors usually the immersion length is:

A, measuring gas, the thermocouple insertion depth should be greater than 95 mm, heat resistance, bimetallic temperature temperature sensor insertion depth should be greater than 115 mm.

B, measuring liquid, thermocouple, heat resistance, bimetallic temperature temperature sensor insertion depth should be greater than 46 mm.

insert depth = C, temperature temperature sensor connector + wall thickness + in length.

D, if process pipe size is too small ( Less than 80 mm in diameter) Install the temperature sensor, the temperature shall be made for the expansion pipe.

E, for the average temperature measurement of tower equipment, temperature when mounted horizontally, the temperature sensor temperature temperature sensors in the 300 - insertion depth 400 mm, for boiler furnace temperature measurement, temperature temperature sensors are mostly horizontal installation, remove the thickness of the furnace refractory brick, thermocouple just inserted into the furnace of 150 mm.

temperature sensor temperature

1. Temperature of the temperature sensor protective

temperature temperature sensors in the use of harsh conditions, the temperature sensor of waterproof, dustproof, moisture and prevent collision requirements, such as new sensitive electronic temperature temperature sensor using the micro assembly ( MPT） Technology and exquisite of laser seal welding, the conventional protection IP65, input type temperature sensor temperature can reach IP68 protection grade, can be used fully in the water. Have special requirements to when ordering please specify.

2. Temperature of electric temperature sensor select

temperature sensor temperature value can be converted into electricity signal, temperature measurement and control system of transmission to the instrument or PLC. Gen gold electronic temperature temperature sensors can provide: PT100 temperature signal; Current mode: 4-20 ma; Voltage type: 0-5 VDC, 1-5 VDC, 0. Five to four. 5 v, 0 to 10 VDC signal types.