The main functions of Atlas Copco's air compressor pressure sensors
Pressure monitoring: Real-time detection of key positions' pressure values such as suction pressure, exhaust pressure, and pressure before and after the oil-gas separator of the air compressor.
Safety protection: When the pressure exceeds the set range (such as overpressure), the sensor will trigger an alarm or shut down the control system to prevent equipment damage.
Intelligent adjustment: Combined with Elektronikon® and other control systems, it automatically adjusts the operating status of the unit (such as loading/unloading, variable frequency speed) based on the measured pressure, ensuring the output pressure remains stable at the set value.
Common types and installation locations
Exhaust pressure sensor: Installed at the exhaust port of the air compressor main unit or the outlet of the oil-gas separator, monitoring the final output pressure of compressed air, it is one of the most core pressure sensors.
Oil-gas separator differential pressure sensor: Detecting the pressure difference before and after the oil-gas separator to determine the filter element blockage situation and alert for timely replacement.
Suction pressure sensor: Equipped in some models, monitoring the suction port pressure, assisting in judging whether the intake system is normal (such as air filter blockage). Technical features
High precision: The measurement accuracy is typically within ±0.5% to ±1% FS (full scale), ensuring the accuracy and reliability of the pressure data.
Temperature and pressure resistance: It can adapt to the high temperature (up to 100~120℃) and high pressure (usually 0~16 bar or higher) environment inside the air compressor.
Signal output: It mostly adopts standard electrical signals (such as 4~20mA, 0~10V) or digital signals, compatible with the control system.
Durability: The shell is mostly made of stainless steel, resistant to corrosion and vibration, and suitable for harsh industrial environments.
Common faults and maintenance
Fault manifestations: Abnormal pressure display (too high, too low or fluctuating), frequent alarm shutdown of the unit, failure of pressure control, etc.
Possible causes: Sensor aging, loose or corroded wiring, probe blockage (such as oil stains, water vapor adhesion), calibration drift, etc.
