How much do you know that pressure type thermometer common sense?

We live in a temperature environment, so the thermometer should still have to understand, but there is a kind of thermometer do you know? That is the purpose of the pressure type thermometer, it is very extensive, the following will introduce the common sense of the pressure type thermometer! Applications: industrial boilers, pressure type thermometer can passive remote transmission. Working principle: the principle of the thermometer is based on the sealing temperature measurement system and saturated vapor pressure of liquid evaporation temperature, the change of the relationship between the temperature measurement. When bulb feel temperature, saturated vapor produced the corresponding pressure in the closed system, cause the change of curvature elastic element, make its produce a shift in the free end, again by the displacement amplification mechanism of gear into the indicated value. Features: the thermometer with a bulb small volume, fast response, high sensitivity and direct reading characteristics, almost set the glass rod thermometer, bimetallic thermometer, all the advantages of the gas pressure thermometer, it can be made into shock, anti-corrosion type, and can realize remote contact signals, heat resistance, 0 10 ma, or 4 20 ma signal. Is currently the most widely use scope, performance is one of the most comprehensive mechanical thermometer table. Pressure type thermometer is the use of sealed container of liquid, gas or saturated steam heated volume expansion and pressure changes as the signal. Its basic structure is made up of bulb, capillary and indicator of three parts. It is one of the earliest methods of temperature control applied in the production process. Pressure type temperature measuring system now is still on the instructions and control is widely used in the temperature measurement method. Pressure type thermometer is: the advantages of simple structure, high mechanical strength, is not afraid of vibration. The price is low, does not need external energy. Defect is: 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 is limited, ability is limited. Isn't this a few questions of pressure type thermometer has a preliminary understanding of the?