WRN explosion-proof thermocouple

Product Introduction: Explosion proof thermocouples are widely used in industries such as steelmaking and ironmaking, petrochemicals, machinery manufacturing, glass and ceramics, plastics and rubber, brewing and pharmaceuticals, light industry and textiles, food, tobacco, water treatment, thermal power, and nuclear industry. Industrial explosion-proof thermocouple, thermoelectric ..

Explosion proof thermocoupleWidely used in industries such as steelmaking and ironmaking, petrochemicals, machinery manufacturing, glass and ceramics, plastic and rubber, brewing and pharmaceuticals, light industry and textiles, food, tobacco, water treatment, thermal power, and nuclear industry.

Industrial explosion-proof thermocouples and thermistors are used as sensors and display instruments 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 our company's chemical special explosion-proof thermocouples and thermal resistors is designed and manufactured according to the "Explosion proof Electrical Equipment for Explosive Environments" standard issued by ******. The thermoelectric characteristics comply with international IEC standards and have been tested and qualified by the ****** Instrument Explosion proof Safety Supervision Station. The structure, mechanism, and assembly method of explosion-proof thermocouples and thermal resistors 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 the ****** explosion-proof standard.

Characteristics of Explosion proof Thermocouples

Multiple explosion-proof forms with good explosion-proof performance;

Pressure spring type temperature sensing element with good anti vibration performance;

Large temperature measurement range;

High mechanical strength and good pressure resistance;

Principle of explosion-proof thermocouple

Explosion proof thermocouples utilize gap explosion-proof technology 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 of explosion-proof thermocouple

Product execution standards

IEC584

IEC1515

GB/T16839-1997

JB/T5582-91

GB3836

◆ Room temperature insulation resistance

Thermocouples are tested at an ambient temperature of 20 ± 15 ° C, relative humidity not exceeding 80%, and a test voltage of 500 ± 50V (DC). The insulation resistance between the electrode and the outer sheath is greater than 1000 Ω. m

Working principle of thermocouple

Two conductors with different compositions (called thermocouple wires or thermoelectric electrodes) are connected at both ends to form a circuit. When the temperatures of the two junction points are different, an electromotive force is generated in the circuit, which is called thermoelectric effect, and this electromotive force is called thermoelectric potential. Thermocouples use this principle to measure temperature. The end directly used to measure the temperature of the medium is called the working end (also known as the measuring end), and the other end is called the cold end (also known as the compensating end); Connect the cold end to the display instrument or matching instrument, and the display instrument will indicate the thermoelectric potential generated by the thermocouple.

Allowable error of division number