Multi-point explosion-proof thermal resistance features pressure spring type temperature sensing element, good vibration resistance; High measurement accuracy; No need to compensate wire, save cost; Imported thin film resistor element, reliable and stable performance. Work principle of flameproof thermal resistance is to use the clearance and isolation principle Multipoint explosion-proof heat resistance selection, design has enough strength of the junction box, and other components, all can produce sparks, arc and dangerous parts are sealed in the junction box cavity temperature, when the explosion cavity Multipoint explosion-proof heat resistance, can remove from heat and cooling by joint clearance, The flame and temperature after the explosion can not be transmitted to the multi-point explosion-proof thermal resistance model outside the cavity, so as to isolate the explosion. IEC751 JB/T18622-1997 JB/T8623-1997 JB/T5518-91 adopts German imported chip assembly with high precision and high stability, multi-point explosion-proof thermal resistance WZP-240D, error ≤0.2%, is the measurement of liquid nitrogen, Liquid hydrogen and other cryogenic objects special sensor. Technical parameters: temperature range: -200 ~ 150℃ Indexing no. : PT100 Precision: 0.2%±1 word connection thread: M27×2 or customized according to user requirements structure material: protection tube material: 1C18Ni9Ti