Industrial flameproof thermocouple is a kind of temperature sensor, which is widely used in chemical industry automatic control system. Through flameproof thermocouple, the temperature parameters of the control object can be changed into electrical signals, which can be transmitted to the display instrument, recorder and regulator, so as to detect, adjust and control the system.

In chemical plants, the production site is often accompanied by a variety of flammable, explosive and other chemical gases, if the use of ordinary thermocouple is very unsafe, easy to cause environmental gas explosion. Therefore, in these occasions must use flameproof thermocouple as temperature measuring instrument, the flameproof thermocouple products produced by our company are suitable for EXd ⅱ CT6 temperature group within the danger of explosive gas places.

Working principle:

If a closed circuit is composed of two homogeneous conductors (thermal electrodes) of different compositions, a current will flow through the circuit when there is a temperature gradient between the two ends, and then there is a thermoelectric potential between the two ends.

Explosion-proof principle:

Using the principle of gap flameproof, the design of junction box and other parts with sufficient strength, will produce sparks, arcs and dangerous temperature parts are sealed in the junction box, when the explosion occurs in the cavity, can be flameout and cooling through the joint surface gap, so that the flame and temperature after the explosion does not spread to the outside of the cavity.

Points:

According to the international IEC standard z.UI new explosion-proof specification GB3836 design;

Adopt two - cavity flameproof structure, easy to replace temperature measuring element, safe and reliable to use

Flameproof mark EXd ⅱ CT6, suitable for ⅱ C level below, ignition temperature above T6, containing explosive gas temperature measurement. Selection method: