This is a high-resolution differential pressure breakout with I2C communication, used to measure the difference in pressure across two points on a device. A high-performance MEMS pressure chip and a special conditioning chip are encapsulated inside the sensor. It will give you a comparative measurement between two points. The sensor IC adopts a unique multi-stage temperature-compensation algorithm to reduce the effect of the environment on the sensor output. Note: In order to ensure the measurement resolution and the sensor life, please use the sensor in the clean air. Do not let water enter the nozzle of the sensor or it will cause damage. The online Wiki will help you to get started, and there\’s also a community review for this differential pressure sensor here. Connection Example – Arduino Features Multi-stage temperature-compensation algorithm I2C digital output High resolution Specification Operating Voltage: 3.3V~5V Measuring Range: 500pa1.5%FS Operating Current: <5mA Communication Mode: I2C I2C Address: 0x00 Operating Temperature Range: -40~85 Temperature-compensation Range: -5~65 Dimension: 14.5x24mm Package Contents 1x Differential Pressure Sensor (500pa) 1x 2.54mm 4-pin Black Single Row Pin Header Silicone tubes not included Resources Product wiki Pinout Pin Label Description 1 VCC Positive 2 GND Negative 3 SCL I2C data line 4 SDA I2C data line