Product name: WR series flameproof thermocouple / thermal resistance WR series flameproof thermocouple / thermal resistance
Number of products: 141538-108
Product model: 0
Manufacturer: Thermocouple--Shanghai Feilong Instrument Electric Co., Ltd.
Product details Product pictures:
WR series flameproof thermocouple
Industrial explosion-proof thermocouple is a kind of temperature sensor. It is widely used in the chemical industry automatic control system. Through the temperature sensor, the temperature parameter of the control object can be converted into an electric signal, which is transmitted to the display, recording and adjustment instruments. Detection, regulation and control.
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 explosion. Therefore, in these occasions, explosion-proof thermocouples must be used as temperature sensors. The flame-proof thermocouple products produced by our factory are suitable for use in places with explosive gas danger in the dllBT4, dIllCn ～ 6 temperature group interval.
The technical performance of the explosion-proof thermocouples produced by our company meets the technical conditions of ZBNll002-87 industrial thermocouples and ZBY300-85 industrial thermocouple index tables and allowable errors. At the same time, the products meet the general requirements of explosion-proof electrical equipment for explosive environments GB38836-1—83. For GB3836.2-83 standard, the drawings, technical documents, and prototypes of products are specially examined and approved by the national-level instrument explosion-proof safety supervision and inspection station, and an explosion-proof certificate is issued.
At present, the company's industrial flameproof thermocouples are nickel-chromium-nickel-silicon (K type) and nickel-chromium-copper nickel (giant).
Thermal response time
When there is a step change in temperature, the time required for the output of the thermocouple to change to 50% of the step change is called the thermal response time, which is represented by T0.5.
Generally refers to the static external pressure that the protective tube can withstand without breaking at normal temperature. The test pressure is generally 1.5 times the nominal pressure. In fact, the allowable working pressure is not only related to the protective material, diameter, and wall thickness, but also to its structural form, installation method, and insertion depth
And the velocity and type of the measured medium.
Explosion-proof type and class
Explosion-proof group: dllBT4 dllCT—6
Enclosure protection level: IP65 (GB4208 standard)
Principle and structure
The structure and principle of flameproof thermocouples and assembled thermocouples are basically the same. The difference is that the explosion-proof product junction box (shell) is designed with a special explosion-proof structure. The junction box is die-cast from high-strength aluminum. It has sufficient internal space, wall thickness, and mechanical strength. The thermal stability of the rubber seal ring meets national explosion-proof standards. Therefore, when the junction box explodes inside and the radon mixed gas explodes, its internal pressure will not damage the junction box. And the thermal energy generated cannot be diffused outwards-transmitted.
Because the product adopts the above-mentioned special structure of anti-riot, the product is fully used in the explosion-proof category of dllBT4 ~ dllCT6. As long as the user strictly abides by the product usage rules, the product can achieve a reliable explosion-proof effect.