Do you know why pressure type thermometer production cycle is so long?

Pressure type thermometer is according to the loading container seal of the pressure of heat medium will change with temperature principle, to measure temperature. Pressure type thermometer is mainly composed of spring tube, connected to the capillary tube and bulb. Its internal and a heat medium of a closed system. Bulb under the condition of heat, increase the stress direction along the spring tube in transmission organization leads, the instrument pointer will to a certain extent affect the elastic deformation of the spring pipe, and display the temperature. General pressure type thermometer production cycle is about one month, is mainly determined by its structure. When all the assembly is completed, we need to put the pressure type thermometer temperature 20 days or so, mainly due to filling the gas in a closed system if there is a micro leakage of short time is invisible, must be placed 20 days or so, reunification of testing temperature, the temperature is not allowed if happen, then the pressure type thermometer in the air, we need to production. Fire makes sweet malt, in the production process of pressure type thermometer full withdrawal. So, if there is a need to purchase a batch of pressure type thermometer, need 1 months in advance orders, so to get its hands on our products will be a guarantee of quality.