Hvad er en flamesikker termoelement?

Mar 18, 2025

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Explosion-proof thermocouple is a temperature sensor. It is widely used in the automatic control system of the chemical industry. Through the temperature sensor, the temperature parameters of the controlled object can be turned into electrical signals, which are transmitted to the display, recording and conditioning instruments to detect, regulate and control the system. 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 explosions. Therefore, explosion-proof thermocouples must be used as temperature sensors in these places. The explosion-proof thermocouple products produced by our company are suitable for places with Eksplosive gasfarer inden for DⅱCT6 -temperaturgruppen .

Arbejdsprincip:

Hvis der dannes et lukket kredsløb af to homogene ledere (varme elektroder) af forskellige komponenter, når der er en temperaturgradient i begge ender, strømmer strømmen i kredsløbet, og så vil der være et termoelektrisk potentiale mellem de to ender .

Eksplosionssikkert princip:

Using the gap explosion-proof principle, the design has sufficient strength of the junction box and other components, and all the parts that will generate sparks, arcs and damage temperature are sealed in the junction box. When an explosion occurs in the cavity, it can be extinguished and cooled through the gap of the joint surface, so that the flame and temperature after the explosion will not be transmitted to the outside of the hulrum .

Funktioner:

Designet i henhold til de eksplosionssikre regler GB3836 i overensstemmelse med IEC-standarder; vedtager en to-kammeret eksplosionssikker struktur, let at udskifte temperaturmålingselementet og bruger det sikre og pålidelige eksplosionssikre Mark Dⅱct6, som er velegnet til temperaturmåling på steder under ⅱC-niveau, over antændelsestemperatur T6 og indeholdende eksplosiv gas .}

Bemærkninger:

Sluk for strømmen under vedligeholdelse og reparation .

Vigtige tekniske parametre:

When the temperature of the thermocouple is 20±15°C, the humidity is not more than 80%, and the test voltage is 500±50V (DC), the insulation resistance between the electrode and the outer tube is>1000Ω.m.

Modeleksamen Tolerance Grade

I II

Tolerance temperaturområde grad tolerance temperaturområde grad

Wrn k ± 1,5 grader -40-+375 ± 2,4 grader -40-+333

± 0,004LTL 375-1000 ± 0,0075 LTL 333 ~ 1200

WRM N ± 1,5 grader -40-+375 ± 2,4 grader -40-+333

± 0,004 ltl 375-1000 ± 0,0075 ltl 333-1200

WRE E ± 1,5 grader -40-+375 ± 1,5 grader -40-+333

± 0,004 ltl 375-800 ± 0,004 ltl 333-900

WRF J ± 1,5 grader -40-+375 ± 1,5 grader -40-+333

± 0,004 ltl 375-750 ± 0,004 ltl 333-750

WRC T ± 1,5 grad -40-+125 ± 1 grad -40-+133