是一种温度传感器，在化学工业自控系统中应用极广，通过隔爆型热电偶可将控制对象的温度参数变成电信号，传递给显示仪、记录仪和调节仪，对系统施行检测、调节和控制。 Industrial flameproof thermocouple is a kind of temperature sensor. It is widely used in the chemical industry automatic control system. Through the flameproof thermocouple, the temperature parameter of the control object can be turned into an electrical signal, which is transmitted to the display, recorder and adjustment. Instrument to perform detection, adjustment and control of the system. zzyfwh.com
In chemical plants, production sites are often accompanied by a variety of flammable, explosive and other chemical gases. If ordinary thermocouples are used, it is very unsafe and can easily cause environmental gas explosions. Therefore, in these occasions, explosion-proof thermocouples must be used as temperature measuring instruments. The explosion-proof thermocouple products produced by our company are suitable for use in places with explosive gas dangers in the EXdⅡCT6 temperature group.
If a closed loop is composed of two homogeneous conductors (hot electrodes) with different components, and there is a temperature gradient at both ends, a current will flow through the loop, and then there will be a thermoelectric potential between the two ends.
防爆原理: Explosion- proof thermocouple explosion protection principle:
Utilizing the gap explosion isolation principle, design the junction box and other components with sufficient strength, and seal all the components that will produce sparks, arcs and dangerous temperatures in the junction box. Cool down so that the flames and temperature after the explosion are not transmitted outside the cavity.
Flameproof thermocouple 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 EXdⅡCT6, suitable for temperature measurement below IIC, ignition temperature above T6, and explosive gas-containing occasions.
选型方法: Selection method of flameproof thermocouple :
W temperature meter
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
Installation fixed form
2 fixed thread
4 fixed flange
6 fixed thread taper
Junction box form
Protection tube diameter