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Thermometers
Explosion-proof thermocouple

Overview
是一种温度传感器,在化学工业自控系统中应用极广,通过温度传感器, 可将控制对象的温度参数变成电信号,传递给显 Industrial explosion-proof thermocouple is a kind of temperature sensor. It is widely used in the chemical industry automatic control system. Through the temperature sensor, the temperature parameter of the control object can be converted into an electrical signal and transmitted to the display.

Display, record and adjust the instrument, implement detection, adjustment and control of the system. zzyfwh.com
In chemical plants, the production site is often accompanied by various flammable and explosive chemical gases and steam. If ordinary thermocouples are used, it is very unsafe and can easily cause environmental gas explosion. So here

产品,适用于dⅡCT6温度组别区间内的具有爆炸性气体危险的场所内 In some occasions, explosion-proof thermocouples must be used as temperature sensors. Explosion-proof thermocouple products are suitable for use in places with explosive gas danger in the temperature range of dⅡCT6.

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working principle:
If a closed loop is composed of two homogeneous conductors (hot electrodes) with different components, and there is a current gradient in the loop when there is a temperature gradient at both ends, then a thermoelectric potential exists between the two ends (as shown in the figure below)

(Shown)

Explosion protection principle:
Utilize the gap explosion proof principle, design the junction box and other components with sufficient strength, and seal all the parts that will produce sparks, arcs and dangerous temperatures in the junction box. When the explosion occurs in the cavity

Can be extinguished and cooled through the gap of the joint surface, so that the flame and temperature after the explosion are not transmitted to the outside of the cavity

Features:
Designed according to the latest explosion-proof regulations GB3836 in compliance with international IEC standards;
Adopt two-chamber flameproof structure, easy to replace temperature measuring element, safe and reliable to use
Explosion-proof mark dⅡCT6, suitable for temperature measurement below IIC level, ignition temperature above T6, and in the presence of explosive gas.

选型方法: Selection method of explosion-proof thermocouple :

W temperature meter
R thermocouple
Material of temperature sensing element
N nickel chromium-copper nickel
E nickel chromium-nickel silicon
F iron-copper nickel
C copper-copper nickel
Even wire logarithm
None—single
2-Double branch
Installation fixed form
2 fixed thread
4 fixed flange
6 fixed thread taper
Junction box form
4-Flameproof
Protection tube diameter
0-φ16
1-φ20