我厂是从1974年开始采用高温盐浴炉直接测温的。五年多来,我们深深感到直接测温具有很多优点:(1)测温准确,控温误差小,在整个仪表量程内可控制在±2℃,(2)稳定可靠,灵敏度较高,不受烟雾、气流等外界因素影响;(3)简易可行,结构简单、成本低,一般工厂都能自行加工; Our factory is from 1974 high temperature salt bath furnace temperature measurement. For more than five years, we deeply feel that direct temperature measurement has many advantages: (1) Accurate temperature measurement and small error in temperature control can be controlled within ± 2 ℃ in the entire measuring range; (2) Stable and reliable, with high sensitivity, Not affected by external factors such as smoke and air flow; (3) simple and feasible, simple structure, low cost, the general factory can self-processing;