Explosion proof thermistor

Industrial explosion-proof thermistor is used as a sensor and display instrument for temperature measurement and control, to directly measure and control the temperature of gases, liquids, and vapors in the production process.
The explosion-proof performance of specialized explosion-proof thermocouples and explosion-proof resistance products is designed and manufactured in accordance with the national standard for "Explosion proof Electrical Equipment for Explosive Environments". The thermoelectric characteristics comply with international IEC standards and have been tested and qualified by the National Instrument Explosion proof Safety Supervision Station The structure, principle, and assembly method of explosion-proof thermocouples and explosion-proof thermistors are basically the same. The main difference is that the explosion-proof product junction box (housing) is designed with high-strength aluminum alloy die-casting, and has sufficient internal space, wall thickness, and mechanical strength. The thermal stability of the rubber sealing ring meets national explosion-proof standards. So when the explosive gas mixture inside the junction box explodes, its internal pressure will not damage the junction box, and the resulting heat energy cannot diffuse outward - the explosion cannot be transmitted As long as users strictly follow the product usage rules, explosion-proof thermistor products can achieve reliable explosion-proof effects.


Characteristics
Pressure spring type temperature sensing element with good anti vibration performance;
High measurement accuracy;
No need to compensate for wires, saving costs;
Imported thin film resistor components with reliable and stable performance.


Working principle
Explosion proof thermistor utilizes the principle of gap explosion-proof to design junction boxes and other components with sufficient strength. All components that can generate sparks, arcs, and dangerous temperatures are sealed inside the junction box cavity. When an explosion occurs inside the cavity, it can be extinguished and cooled through the gap between the joint surfaces, preventing the flame and temperature after the explosion from being transmitted outside the cavity, thus achieving explosion-proof.


Main technical parameters


Product execution standards
IEC751 JB/T18622-1997 JB/T8623-1997 JB/T5518-91
Room temperature insulation resistance
Explosion proof thermistor with an ambient temperature of 15-35 ° C, relative humidity not exceeding 80%, and a test voltage of 10-100V (DC). The insulation resistance between the electrode and the outer sleeve is › 100M Ω.


Measurement range and tolerance

Model naming convention