Key Features
- Great low-cost sensing solution for precision measurement of barometric pressure and altitude
- Easy to read altitude with a built in altimeter calculation
- Temperature sensor with ±1degC typical accuracy (±3degC max)
- Easy to use with any microcontroller or Arduino with I2C compatibility
This pressure sensor from Freescale is a great low-cost sensing solution for precision measurement of barometric pressure and altitude. The MPL3115A2 has a typical 1.5 Pascal resolution, which can resolve altitude at 0.3 meters (compare to the BMP180 which can do 0.17m). It has some upsides compared to the BMP280, such as interrupt outputs for ultra-low power usage, and its also a heck of a lot easier to read altitude with a built in altimeter calculation - no calibration reading and calculating required. As a bonus, there's even a fairly good temperature sensor with ±1degC typical accuracy (±3degC max).
This chip likes to be used with 2-3.6V power and logic voltages, so it's placed on a breakout with a 3V regulator and logic level shifting. It's easy to use with any Arduino or microcontroller that has I2C capability.
This chip looks and sounds a whole lot like the MPL115A2 but this is the precision version, which can act as an altitude-sensor as well as barometer.
Item Specifics
Dimensions: 18mm x 19mm x 2mm / .7" x .8" x .1"
Weight: 1.2g
Vin: 3 to 5.5 VDC
Logic: 3 to 5V compliant
Pressure sensing range: 50-110 kPa (up to 10Km altitude)
Altitude resolution: 1.5 Pa / 0.3 m
This board/chip uses I2C 7-bit address 0x60
