WZPK-240 Explosion proof ThermistorThe indicators are as follows:

Range specifications

Model number	graduation mark	Temperature measurement range ℃	accuracy class	Allowable deviation △ t ℃
WZPK WZPK2	Pt100	-200～500	*	±（0.15 +0.002︱t︱）

Note: "t" is the measured temperature of the temperature sensing element,

thermal response time

When there is a step change in temperature, the time required for the output of the thermocouple to change to 50% of the step change is called the thermal response time, represented by T0.5.

Nominal Pressure

Generally refers to the static external pressure that the protective tube can withstand at room temperature without breaking, and the test pressure is generally 1.5 times the nominal pressure. In fact, the allowable working pressure is not only related to the material, diameter, and wall thickness of the protective tube, but also to its structural form, installation method, insertion depth, as well as the flow rate and type of the measured medium.

Thermocouple insulation resistance

The test voltage for insulation resistance at room temperature is DC 500 ± 50V.

The atmospheric conditions for measuring insulation resistance at room temperature are: temperature of 15-35 ℃, relative humidity of 45%, and atmospheric pressure of 86-106kPa.

For thermocouples with a length greater than 1 meter, the product of the insulation resistance value at room temperature and its length should not be less than 100 M Ω M is: Rr · L>100 M Ω· m L>1m, where: Rr - the insulation resistance value of the thermocouple at room temperature, M Ω; L - the length of the thermocouple, m

For thermocouples with a length ≤ 1 meter, the insulation resistance value at room temperature should not be less than 100 M Ω

Explosion proof type and level group

Explosion proof level group: dIIBT4 or dIICT4, dIIBT6 or dIICT6

Intrinsic safety group: ia Ⅱ BT4 or ia Ⅱ CT4 (multi pair)

Ia Ⅱ BT6 or ia Ⅱ CT6 (multi pair)

Shell protection level IP65