If a closed circuit is composed of two homogeneous conductors (thermoelectric electrodes) with different compositions, and there is a temperature gradient at both ends, the circuit Explosion proof thermocouple
There is a current passing through, so there is a thermoelectric potential between the two ends
The explosion-proof principle utilizes the gap explosion-proof principle to design components such as junction boxes with sufficient strength. All components that can generate sparks, arcs, and hazardous temperatures are sealed inside the junction box. When an explosion occurs inside the chamber, it can be extinguished and cooled through the gap between the joint surfaces, so that the flame and temperature after the explosion do not transmit to the outside of the chamber.