Pressure SwitchChina 4-20mA/ 0.5-4.5V/ Spi/ I2c Air Water Digital Pressure Sensor Transducer for Air Conditioning/Pump/Compressor, Find details about China Water Pressure Sensor, Mini Pressure Sensor from 4-20mA/ 0.5-4.5V/ Spi/ I2c Air Water Digital Pressure Sensor Transducer for Air Conditioning/Pump/Compressor