Mikroe DIFF PRESS CLICK (Mikroe-3332) – Differential Pressure Sensor Board, I²C, Range: -7 kPa~7 kPa

The board is designed to operate from a single supply voltage between 3.3V and 5V DC. This wide range ensures compatibility with most common microcontroller platforms like Arduino (5V logic) and Raspberry Pi/ESP32 (3.3V logic) without requiring an external level shifter.

Pressure data is output digitally via the I2C communication protocol. The integrated MCP3221 ADC converts the sensor's analog signal to a 12-bit value. You simply need to connect the board's I2C pins (SDA, SCL) to your microcontroller, provide power, and use the appropriate I2C library to read the register data, which can then be scaled to the -7 kPa to +7 kPa range.

The board features two small, specially designed inlet ports. You can connect flexible tubing (typically 2-3 mm inner diameter) directly to these ports to measure the differential pressure between two points. The port labeled 'P1' is typically the positive pressure side, and 'P2' is the negative/reference side for the differential measurement.

Yes, it is commonly used for indirect airflow measurement. By placing the sensor across a known flow restriction (like an orifice or venturi), the differential pressure generated is proportional to the flow rate. The -7 to +7 kPa range makes it suitable for low to moderate air velocity applications in HVAC ducts or for monitoring fan performance.