热处理用高温盐浴炉常在900～1300℃下使用。对盐浴温度的测量,目前常用光学高温计、红外光电高温计、辐射高温计等非接触式测温或用热电偶直接测温。但前者因受烟雾、粉尘、浮渣等因素影响,测量结果不够准确,误差较大,生产使用中受到限制。后者虽然可以克服热处理现场工作条件的影响,测得的温度精确度高,示值误差较小, Heat treatment with high-temperature salt bath furnace often 900 ~ 1300 ℃ use. Salt bath temperature measurement, the current commonly used optical pyrometer, infrared thermometer, radiation pyrometer and other non-contact temperature or thermocouple temperature measurement. However, the former due to smoke, dust, scum and other factors, the measurement results are not accurate enough, the error is larger, the production is limited. Although the latter can overcome the impact of heat treatment on-site working conditions, the measured temperature accuracy is high, the indication error is small,