The advantage and disadvantage of pressure type thermometer

Now pressure type temperature measuring system is still in situ instructions and control is widely used in the temperature measurement method. Pressure type thermometer is used widely, so what pressure type thermometer faults? Hangzhou bimetallic thermometer manufacturers instrument co. , LTD. According to the production experience summed up the pressure type thermometer advantages and disadvantages.

pressure: the definition of a thermometer thermometer is the use of sealed container of liquid, gas or saturated steam heated volume expansion and pressure changes as the signal.

pressure type thermometer structure: it is the basic structure of the bulb, capillary and indicator of three parts, it is one of the earliest methods of temperature control applied in the production process.

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.

the drawback 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.

pressure type thermometer with a bulb small volume, fast response, high sensitivity, reading the characteristics of intuitive, set the glass rod thermometer, almost all the advantages of bimetallic thermometer, 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.