The principle of pressure type thermometer is based on the relationship between the saturated vapor pressure and the temperature of the evaporated liquid in the closed temperature measurement system. When the temperature changes, the saturated vapor in the closed system will generate corresponding pressure, which will cause the curvature change of the elastic element and the displacement of its free end. Then the displacement will be changed into the indicated value by the gear amplification mechanism. This thermometer has the characteristics of small volume, fast reaction speed, high sensitivity and intuitive reading, almost integrating the glass rod thermometer and bimetal temperature It can be made into shockproof and anticorrosive type, and can realize remote contact signal, thermal resistance signal, 0-10mA or 4-20mA signal. It is a kind of mechanical temperature measuring instrument with the widest range of use and the most comprehensive performance.
Parameters of pressure type thermometer
● explosion proof grade: D Ⅱ BT4, D Ⅱ CT5, D Ⅱ BT6, D Ⅱ CT6
● ambient temperature: - 20-45 ° C
● relative temperature: less than 90%
● altitude: less than 2000m
● thermal resistance accuracy class: Class B
● time constant: 34S

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