Armored thermal resistance 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 . Principle Resistance under the action of temperature thermal resistance wire change. Display instrument will indicate the resistance heat resistance value generated by the value of the corresponding temperature. Main technical parameters Thermal resistance temperature sensor at 100 ℃ resistance value (R100) and at 0 ℃ resistance value (R0) ratios of R100/ R0. Indexing of Pt100: a R0 = 100 ± 0.06. B R0 = 100 ± 0.12. W100 = R100/ R0 = 1.3850 Range specifications Model number Division No. The measuring range accuracy class The allowable deviation hs Pt100 －200～500 A 200~ 650℃± (0.15 + 0.002 - t -) B 200~ 800℃± (0.30 + 0.005 - t -)