高温盐浴炉测温长期以来都是用幅射高温计间接测温。这种测温方法受外界因素影响较大,如盐浴表面的烟雾多少;盐浴表面异物;盐浴表面深浅,光线的明暗等等,因此造成测温不准,炉温不稳,波动大,直接影响到热处理零件的质量。为用热电偶在高温盐浴炉中直接测温,就要用热电偶保护套管。 High-temperature salt bath temperature measurement has long been a radiation pyrometer indirect temperature measurement. This temperature measurement method is greatly affected by external factors, such as how much smoke on the surface of the salt bath; salt bath surface foreign body; salt bath surface depth, light and shade, etc., resulting in temperature is not allowed, the furnace temperature instability, large fluctuations , A direct impact on the quality of heat treatment parts. Thermocouple in the high temperature salt bath furnace for direct temperature, it is necessary to use thermocouple protection tube.