The stress of the structure and principle of the thermometer

The working principle of pressure type thermometer is according to the heat in sealed containers within the medium pressure with temperature changing principle of 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. 400 rf12122 instrument next to explain the structure and principle of the pressure type thermometer: structure: radial type connection: 1/2 & quot; NPT installation: flange material: after all the SS304 stainless steel surface diameter: 100 mm heat pipe diameter: 10 mm heat pipe length: 150 mm temperature range: 0 - 200℃, ℉ ( Can be customized) Accuracy: & plusmn; Table: 2% glass oil filled type: oil charge protection grade: IP65 ( Dust, water) Capillary line length: 3 m pressure type thermometer using the liquid or gas pressure or volume made of the characteristics of non-contact temperature sensor with temperature change. It is a common direct-reading thermometer table. In principle, said of glass liquid thermometer ( Including the mercury thermometer zui commonly used) Also belong to this type of measuring instrument. A higher pressure type thermometer consists of temperature sensitivity package, capillary, spring tube ( Bourdon tube) , moving mechanism and pointer. Bulb contact measured object, carries on the heat equilibrium. Filling in airtight package, capillary pressure and the spring tube material ( Or volume) With the temperature changes. As a result of the change of pressure change in the curvature of spring tube, and the free end displacement, through the connecting rod and direct drive gear drive the pointer on the dial indicator temperature changes in the value. Pressure type thermometer is commonly used in the ship equipment, refrigeration equipment and hot water boiler.