The new tendency of the development of pressure type thermometer

Pressure type thermometer is the use of sealed container of liquid, gas or saturated steam heated volume expansion and pressure changes as the signal. It has a simple structure, high mechanical strength, is not afraid of vibration; Advantage of the price is low, does not need external energy, but its disadvantages are also more, summary, its shortcomings are: limited temperature range, generally in - 80~400℃; Heat loss due to slower response time; Instrument sealing system ( Bulb, capillary, spring tube) Damage is difficult to repair, must be replaced. Measuring accuracy are greatly influenced by environmental temperature, temperature package installation location, accuracy is relatively low; Capillary transmission distance limit. So in recent years, many manufacturers in selecting time mostly choose the bimetallic thermometer and temperature thermocouple thermometer, etc. In order to not eliminated by the market, with the new tendency of the development of pressure type thermometer. Because there are more and more the application of computers in the industrial equipment, requires pressure type thermometer at the time of temperature measurement can be connected to the computer, now can be connected to the computer pressure type thermometer is more popular. But compared with the ordinary pressure type thermometer, more coil spring tube type pressure type thermometer with bellows pressure type thermometer preferred. This is because of these two kinds of pressure type thermometer has simple structure, low production cost. So in order to better maintain the status of the pressure type thermometer, constant innovation and development.