1. Identify the application scenario
Media type: Determine the type of medium that the sensor will measure, such as gas, liquid or steam. For corrosive media, the liquid contact part should choose corrosion-resistant materials such as 316L stainless steel, Hastelloy or ceramic.
Environmental conditions: Consider the environmental conditions where the sensor will work, such as temperature, humidity, vibration, pressure changes, etc. Ensure that the sensor can work stably under these conditions.
Explosion-proof requirements: Confirm whether the sensor needs to be used in flammable and explosive environments. Intrinsically safe pressure sensors are suitable for hazardous environments, such as underground coal mines, petrochemicals, etc.
2. Lock key parameters
Range: The range of the sensor should be selected according to the actual measurement requirements. It is generally recommended that the working pressure does not exceed 80% of the full scale to ensure measurement accuracy and sensor safety.
Accuracy: Select the appropriate accuracy according to application requirements. Industrial applications usually require an accuracy of ±0.5%FS, while high-precision applications (such as aerospace and medical) require ±0.1%FS.
Output signal: Select the appropriate output signal type according to system requirements, such as 4-20mA, 0-5Vdc, 0-10Vdc, etc.
Protection level: Select the appropriate protection level according to the installation environment, such as IP65 (dustproof and waterproof) or IP67 (short-term immersion).
3. Verify reliability
Temperature compensation: Select a sensor with temperature compensation function to reduce the impact of temperature changes on measurement accuracy.
Long-term stability: Consider the long-term stability of the sensor, such as ±0.1%FS/year. Choosing a model with self-calibration function can further improve reliability.
Certification: Make sure that the sensor complies with relevant explosion-proof certifications, such as ATEX, IEExC, etc.
4. Other considerations
Avoid too small a range: When selecting a sensor, the range should be at least 1.5 times the maximum working pressure to prevent the sensor from being overloaded and damaged.
Consider temperature drift: In an environment with large temperature changes, select a sensor with temperature compensation to reduce the impact of temperature drift on measurement accuracy.
Media compatibility: Confirm that the liquid-contacting part of the sensor is compatible with the measured medium to avoid sensor damage due to chemical corrosion.
