The Adafruit 4633 pressure sensor measures absolute atmospheric pressure over a range of 260 to 1,260 hPa and can be used for weather- or altitude-related measurements. Pressure readings have 24-bit resolution and a rate of up to 75 Hz. Accuracy reaches ±0.1 hPa after single-point calibration and is ±1 hPa before calibration.

The breakout board includes a level shifter and voltage regulator, is compatible with 3–5 V power and logic levels, and supports communication via I²C or SPI. The STEMMA QT connectors are compatible with SparkFun Qwiic for the I²C bus.

• Sensor type: Absolute pressure
• Pressure measurement range: 260 to 1,260 hPa
• Pressure data resolution: 24 bit
• Measurement rate: 1 to 75 Hz
• Pressure accuracy: ±0.1 hPa after single-point calibration, ±1 hPa before calibration
• Temperature measurement: 16-bit resolution
• Temperature compensation: Integrated
• Interfaces: I²C and SPI
• I²C address: 0x5D, switchable to 0x5C via jumper
• Power supply and logic level compatibility: 3–5 V
• FIFO memory: Integrated
• Interrupt functions: Data-ready indication, FIFO flags, and pressure limits
• Overpressure resistance: 20 times full scale
• Shock resistance: 22,000 g
• Connectors: STEMMA QT, compatible with SparkFun Qwiic
• Breakout board circuitry: Level shifter and voltage regulator