Thermal resistance

The working principle of

       Assemble thermal resistance armoring thermal resistance

       Thermal resistance is used to measure the temperature of a substance by the characteristic that its resistance changes with the change of temperature. When the resistance value changes, the operating instrument displays the temperature value corresponding to the resistance value.

Flameproof thermal resistance

        Based on the principle of material gap explosion proof, the design of junction box and other parts with sufficient strength will produce sparks and arc and dangerous temperature of the components are in the junction box cavity, when the explosion occurred in the box, through the joint surface gap ,The flamebox is cooled so that the flame and temperature after the explosion cannot be transmitted to the outside of the box.

 Overview of thermal resistance performance

 Product implementation standard: IEC751 GB/ t8622-1997

 Temperature range and tolerance

Insulation resistance at room temperature 

The thermal resistance of armor is at the ambient temperature of 15-35℃, the relative temperature is not more than 80%, and the experimental voltage is 10-100 - v (dc), and outer casing of the insulation resistance between the electrodes Ω 1000 m or higher

Resistance wire diameter material and material

 Temperature range and tolerance

Explosion-proof thermal resistance

Measurement range and tolerance

Integrated explosion-proof thermal resistance

The working principle of

       The thermal resistance of explosion proof USES the principle of gap explosion proof, when the explosion happens in the cavity, it can shut off and cool down through the gap of the joint surface, so that the full temperature of the flame after the explosion cannot be transmitted outside the cavity, so as to carry out explosion proof.

       The thermoelectric potential resistance generated by the thermal resistance generates unbalanced signal through the bridge of the temperature transmitter, which is amplified and converted into 4~20mA direct current signal to the working instrument, which displays the corresponding temperature value.

 Product execution standard

 IEC751

 JB/T5518-1991

 Measurement range and tolerance

Working environment

Precision grade

 Accuracy class of temperature transmitter: 0.1; 0.2; 0.5

 Precision level of display: 2.5 level of analog indicator; Digital display level 1.0