Sleeve type thermal resistance WZP-2328/WZP2-2328 manufacturer/price/technical parameters

Industrial thermistors are commonly used as sensors for measuring temperature, in conjunction with display instruments, recording instruments, and electronic regulators. It can directly measure the surface temperature of liquids, vapors, gases, and solids in the range of -200 ℃ to 420 ℃ during various production processes.

According to national regulations, our factory has been producing two types of assembled and uniformly designed thermal resistors, PT1000 platinum resistors that comply with IEC standard division numbers and Cu50 copper thermal resistors that comply with professional standard division numbers, since 1987. Should comply with JB/8622-1997 and JB/T8623-1997 standards.

□ Main technical indicators

·Measurement range and accuracy

Note: "t" in the formula represents the measured value of the temperature sensing element.

□ Model representation

The resistance value (R) of a thermistor temperature sensing element at 100 ℃₁₀₀）And its resistance value R at 0 ℃₀Ratio: R₁₀₀/ R₀

Division number Pt100: * R₀= 100±0.06Ω)

B-grade R₀= 100±0.12Ω)

Index number Cu50: R₀= 50±0.05Ω)

·Thermal response time

When there is a step change in temperature, the output of the thermal resistor changes to 50% of the step change, and the required time is called the thermal response time, which is denoted by T_0.5express

·Thermistor nominal pressure

Generally refers to the external pressure (static pressure) that the protective tube can withstand without rupture at the operating temperature. The allowable nominal pressure is not only related to the material of the protective tube, installation method, insertion depth, as well as the flow rate and type of the measured medium.

·Thermistor with the smallest insertion depth

lmin=l_yuan+15D）

Lmin=-- the smallest available insertion depth

l_yuan--Length of temperature sensing element

D - Outer diameter of protective tube

·Self heating effect

When the measurement in the thermal resistance is 5mA, the measured resistance increment converted to temperature value should not exceed 0.030 ℃.

·Insulation resistance

The test voltage for insulation resistance at room temperature can take any value from 10 to 100V DC, with an ambient temperature range of 15 to 35 ℃ and a relative humidity not exceeding 80%. The insulation resistance value at room temperature shall not be less than 100M Ω.

Working principle

Industrial thermal resistors are divided into two categories: platinum thermal resistors and copper thermal resistors.

Thermistor measures temperature by utilizing the characteristic that a substance's own resistance changes with humidity. The heated part (temperature sensing element) of a thermal resistor is uniformly wound around a skeleton made of insulating material with thin metal wires. The average temperature in the medium layer within the measured range.

The prefabricated thermistor is mainly composed of a junction box, protective tube, terminal block, insulation sleeve flip sensing element, and is equipped with various installation and fixing devices.

The temperature sensing element of WZP platinum resistance is a platinum wire winding, and dual platinum resistance is mainly used in situations where two sets of display, recording or regulating instruments are required to simultaneously detect the temperature at the same location. The temperature sensing element of WZC type copper resistor is a copper wire winding.