3-axis digital compass by Honeywell. I2C, 1-2 degree heading accuracy.
3-axis accelerometer, ±2g to ±16g. I2C/SPI, tap and freefall detection.
Air quality sensor for CO2, ammonia, benzene, alcohol. Analog and digital output.
Gas sensor for LPG, propane, hydrogen, methane, smoke. Analog and digital output.
Analog temperature sensor, 10mV/C output. Linear, no calibration needed.
1-Wire digital thermometer. +/-0.5C accuracy, waterproof versions available.
Combined pressure, temperature, and humidity sensor. Bosch, I2C/SPI.
Barometric pressure and temperature sensor by Bosch. I2C and SPI, ±1 hPa.
6-axis IMU with gyroscope and accelerometer. I2C interface, onboard DMP.
PIR motion detector module. 7m range, 110 degree angle, adjustable sensitivity.