The BME280 Atmospheric Sensor from Whadda is the easiest way to measure barometric pressure, humidity and temperature.

LPS331AP Pressure/Altitude Sensor Carrier with Voltage Regulator

Pressure Sensor MD-PS002 - Absolute Pressure

Life has its ups and downs, so why not measure them? The MPL3115A2 is a MEMS pressure sensor that provides Altitude data to within 30cm (with oversampling enabled).

The SparkFun BME280 Atmospheric Sensor Breakout is the easy way to measure barometric pressure, humidity, and temperature readings all without taking up too much space.

Want to start playing with sensors, but don&rsquot know where to begin? This kit includes a variety of basic sensors for any beginner or experienced programmer. With everything included in this kit, you&rsquoll be able to sense acceleration, force, vibration, Infrared light, ambient light, temperature, and more!