1. Choose the right range
Reasonable selection: When selecting a sensor, you should ensure that its range can meet the actual measurement needs. It is usually recommended that the working pressure does not exceed 80% of the full range to ensure measurement accuracy and sensor safety.
Safety factor: When selecting a range, a certain safety factor should be considered. For example, if the maximum working pressure is 10 MPa, it is recommended to select a sensor with a range of 12.5 MPa or higher.
2. Install a pressure limiting device
Pressure limiter: Install a pressure limiter at the air inlet or liquid inlet of the sensor. When the pressure exceeds the set value, the pressure source is automatically cut off to prevent overload.
Safety valve: Install a safety valve. When the pressure exceeds the set value of the safety valve, the safety valve automatically opens to release excess pressure and protect the sensor.
3. Use a buffer device
Buffer: Install a buffer at the air inlet or liquid inlet of the sensor, which can effectively absorb the instantaneous impact of pressure and reduce the impact force on the sensor.
Shock absorber: Use shock absorbers, such as rubber pads or springs, at the installation location of the sensor to reduce the impact of external vibration on the sensor.
4. Monitoring and alarm
Pressure monitoring: Install pressure monitoring equipment to monitor pressure changes in real time. When the pressure approaches or exceeds the range of the sensor, an alarm is issued in time.
Automatic control system: Combined with the automatic control system, when the pressure exceeds the set value, measures are automatically taken, such as shutting down the pressure source or starting the pressure relief device.
5. Regular maintenance and calibration
Regular inspection: Regularly check the appearance and connection parts of the sensor to ensure that there is no damage or looseness.
Regular calibration: Calibrate the sensor regularly to ensure its measurement accuracy. During the calibration process, you can check whether the overload protection function of the sensor is normal.
Cleaning and maintenance: Clean the surface and inside of the sensor regularly to remove impurities such as dust and oil to prevent damage to the sensor due to blockage or corrosion.
6. Avoid instantaneous impact
Slowly pressurize: When starting the system, the pressure should be increased slowly to avoid instantaneous high pressure from impacting the sensor.
Use soft start device: In systems that require rapid pressurization, use soft start devices such as frequency converters or throttle valves to reduce instantaneous shocks.
7. Select high-reliability sensors
High accuracy and high reliability: Select high-precision, high-reliability sensors, which usually have better overload protection and higher safety factors.
Temperature compensation: Select sensors with temperature compensation to reduce the impact of temperature changes on measurement accuracy.
Long-term stability: Select sensors with good long-term stability, such as ±0.1%FS/year, to ensure the reliability of the sensor in long-term use.
8. 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.
Medium compatibility: Confirm that the liquid-contacting part of the sensor is compatible with the measured medium to avoid damage to the sensor due to chemical corrosion.
