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Industry Information
Explosion-proof thermocouples for industrial use
2012-2-27 9:16:36

Details of HD series explosion-proof thermocouple:

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,传递给显示、记录和调节仪,对系统施行检测、 调节和控制。 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 electric signal, which is transmitted to the display, record and regulator, and the system is tested. , Regulation and control. 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. Therefore, explosion-proof thermocouples must be used as temperature sensors in these occasions. The explosion-proof thermocouple products produced by our company are suitable for use in places with explosive gas dangers in the dⅡCT6 temperature group interval.

Working principle If a closed loop is composed of two homogeneous conductors (hot electrodes) of different components, when there is a temperature gradient at both ends, a current will flow through the loop, then there will be a thermoelectric potential between the two ends

Explosion-proof principle Use the principle of gap explosion-proof to design the junction box and other components with sufficient strength, and seal all parts that will produce sparks, arcs and dangerous temperatures in the junction box. When the explosion occurs in the cavity, it can pass through the gap of the joint surface. Flameout and cooling, so that the flames and temperature after the explosion are not transmitted outside the cavity

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.

Classification of general flameproof thermocouples and thermal resistors
· Designed in accordance with the latest explosion-proof specifications 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 dⅡBT4, suitable for temperature measurement in places with IIB or below, ignition temperature above T4, and places with explosive gas.



、热电阻概要 Overview of armored explosion-proof thermocouples and thermal resistances



The protective tube and the measuring element are of a separate structure, which can quickly replace the temperature measuring element and perform repair without stopping.


The protection tube has various forms and materials, which can meet the temperature measurement requirements of high pressure, high temperature and strong corrosive media.


Adopt armored components, pressure resistance, shock resistance, stable and reliable work.


Explosion-proof mark dⅡBT4, iaⅡCT4, suitable for temperature measurement below Class Ⅱ, ignition temperature above T4, and explosive gas.



的种类:K型防爆热电偶、K型防爆耐磨热电偶、E型防爆热电偶、多点防爆热电偶、多点防爆装配热电偶、多点防爆铠装热电偶、防爆铠装热电偶、防爆型热电偶、防爆铠装热电偶、防爆耐腐热电偶等等。 Types of explosion-proof thermocouple : K-type explosion-proof thermocouple, K-type explosion-proof wear-resistant thermocouple, E-type explosion-proof thermocouple, multi-point explosion-proof thermocouple, multi-point explosion-proof assembly thermocouple, multi-point explosion-proof armored thermocouple, explosion-proof armor Thermocouple, explosion-proof thermocouple, explosion-proof armored thermocouple, explosion-proof and corrosion-resistant thermocouple, etc.


Explosion-proof principle Use the principle of gap explosion-proof to design the junction box and other components with sufficient strength, and seal all parts that will produce sparks, arcs and dangerous temperatures in the junction box. When the explosion occurs in the cavity, it can pass through the gap of the joint surface. Flameout and cooling, so that the flames and temperature after the explosion are not transmitted outside the cavity