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Air2D v1.0 $23.65US
2 - 6 : $22.47US ( save 5% )
7 - 19 : $21.29US ( save 10% )
20 + : $18.92US ( save 20% )
excl. sales tax

Sense both barometric air pressure as well as ambient temperature with this sensor. Go up in the air, climb a mountain: our software allows you to calculate your altitude using the sensor data. A digital I2C sensor, that outputs high resolution, low-noise signals.

Application examples

  1. Combine the Baro sensor with a Humid and Light to create a full-blown home climate control system. Add Switches to control water valves.

Technical specifications

Product Baro sensor
Version 1.0 (April 2016)
Sensing parameter barometric air pressure and ambient temperature
Sensing method piezo-resistive MEMS sensor
Pressure range 10 to 1200 mbar (1 to 120 kPa)
Pressure accuracy 2.5 mbar (at -20 to +85 C, 450 to 1100 mbar)
Pressure resolution 0.065 to 0.012 mbar (dependent on oversampling ratio)
Pressure response time 0.5 to 8 ms (dependent on oversampling ratio)
Temperature range -40 to +85 C (-40 to +185 F)
Temperature accuracy 0.8 C (1.4 F)
Temperature resolution less than 0.01 C (0.02 F)
Sensor dimensions 20 x 15 x 5 mm (0.78 x 0.39 x 0.2 inch)
Weight 7 g (0.2 oz), incl. cable
Cable 1.0 m (39 inch), shielded, red wire = power, black wire = ground, grey wire = I2C data (SDA), white wire = I2C clock (SCL), maximum extension 1 m (3 ft)
Connector male 1x4 plug with a row of 4 pins spaced 2.54 mm (0.100 inch)
Software support

Application notes

  1. Make sure the sensor is plugged into the digitizer with the red wire connected to power. Reversing the plug may cause damage to the sensor.
  2. Requires a digitizer with digital (I2C) ports, eg. the USB-microDig or the Wi-microDig.
  3. The default I2C address is 119 (0x77). Both I2C lines have 2.2 kOhm pull-up resistors.
  4. Our software enables you to use most features of this sensor.
  5. For more technical specs, and to find out how to access the sensor data in detail, please consult this datasheet.
  6. To extend the cable, use ExtendCableD-01 and/or ExtendCableD-10.
  7. The sensor comes fitted with a 1x4 plug for use with a USB-microDig running firmware v7.3 or higher but includes an extra 1x4 housing to modify the plug for use with a Wi-microDig running firmware v6.2 or v6.3 or a USB-microDig running v7.2. There's also the AdaptCableDto2D and the AdaptCableKit. Need it already fitted with a 2x4 plug ? Just ask us.

This page was updated on Tuesday 23 July 2019.
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