Protection method for pressure sensor working in high temperature environment: Xi'an Huaheng Instrument: If the pressure sensor works in a high temperature environment for a long time without taking protective measures, its motherboard circuit, parts, seals and machine The core may burn out. In order to make the sensor work normally for a long time, it is necessary to take corresponding measures. Let's share the relevant experience with you.
If the temperature of the measuring medium is 70 to 80 ° C, only a heat sink needs to be added to the pressure sensor or the pressure gauge and the pressure connection. This can lower the temperature appropriately, allowing the medium to dissipate heat through the heat sink and directly contact the meter.
If the measured medium temperature exceeds 100 ° C, and the maximum temperature reaches 200 ° C, we need to install a condensation ring at the pressure tap and then add a heat sink, so that the medium is cooled by the condensation ring, and then the heat sink is directly in contact with the pressure sensor through the heat sink. The temperature is very low.
In the case of measuring the temperature is too high, the pressure guiding tube can be extended and connected to the pressure sensor, or the heat sink can be installed after the capillary is added to achieve the effect of the medium cooling.
The above are several types of pressure sensor installation methods where the temperature of the medium is too high, which is different from the installation of the isolation diaphragm. An isolation diaphragm is added to the pressure sensor or pressure gauge, which is a diaphragm pressure gauge and a diaphragm pressure sensor. This is designed for the easy to block corrosive medium, so that the pressure of the medium acts on the diaphragm instead of the pressure. Direct contact of the sensor.
It can be seen that the correct installation method is not only related to the measurement accuracy of the pressure sensor, but also related to the service life of the sensor. Therefore, in special (such as high temperature), you should pay more attention to the way the sensor is installed.
Ultra-high temperature pressure sensors generally use high-temperature melt pressure sensors.
Usually, the damage of the high temperature melt pressure sensor is caused by the improper installation position. If the sensor is forcibly installed in an excessively small hole or an irregular hole, the vibration film of the sensor may be damaged by the impact. Choosing the right tool to machine the mounting hole is beneficial to control the size of the mounting hole. In addition, the proper mounting torque is good for forming a good seal, but if the installation torque is too high, it will easily cause the high temperature melt Turck pressure sensor to slip. To prevent this from happening, it is common to apply a release compound to the threaded portion of the sensor prior to installation.