Explosion-proof thermal resistance

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Explosion-proof thermal resistance
Posting date : May 29, 2014
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■ Application Usually matching with display instrument, memorizing meter, electronic computer . Directly measure hydrocarbons which may cause explode 0 ~ 500 ℃ about liquid, steam,gas and surface temperature of solid medium at the production site . ■ Characteristics ● Pressure spring type temperature sensing element, good vibration resistance performance; ● large measuring range; ● without payment of compensation wire, cost savings; ● imported film resistor, reliable and stable performance ■ Principle Explosion-proof thermal resistance using gap explosion-proof junction box and other components of the design principles, with sufficient strength, all can produce a spark, arc and dangerous temperature components are sealed in the junction box cavity, when the cavity when the explosion occurred, can pass through the gap of joint surface quenching and cooling, the explosion of flame and the temperature sensor is not to outside of the cavity, thus the temperature. ■ Main technical parameters Executive standard ● product IEC751 JB/T86221997 JB/T96231997 JB/T5518-91 ■ Cold insulation resistance Explosion-proof thermal resistance is 15 ~ at ambient temperature of 35 ℃, relative humidity of not more than 80%, the test voltage is 10 ~ 100V (DC) insulation resistance than 100M Ω.M between the electrode and the outer tube ■ Temperature range and tolerance ● temperature range and tolerance ■ Selection guidelines 1) model Division No. 2) 3) explosion-proof rating 4) accuracy class 5) fixed form 6) protection tube material 7) length or depth of insertion Cases of patients with A: explosion-proof thermal resistance, Pt100, fixed thread M27 × 2, explosion-proof grade D to BT4 grade II, protecting tube 316, insert depth 300mm. HR-WZP-240, Pt100, L=450 * 300, D Ⅱ BT4 temperature transmitter 0.5, protecting tube 316, thread M27 * 2.

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