Handheld CO₂ Meter GM70

Note that the GM70 is discontinued product. View the new Indigo80, also designed for use as a handheld meter.

The Vaisala CARBOCAP® Hand-held Carbon Dioxide Meter GM70 measures volume concentration of CO2 in the units of ppm or %. It is a user-friendly meter for demanding spot measurements in laboratories, greenhouses, mushroom farms, and for ensuring CO2 safety during soft drink bottling processes. The measurement accuracy is not affected by dust, water vapor or most chemicals. The meter can also be used in HVAC and industrial applications, and as a tool for checking Vaisala's fixed CO2 instruments. Also the GMW90  can also be adjusted by using the GM70 meter.

Keen on GM70 handheld CO₂ meter? You are going to love Indigo80.

Vaisala's Indigo80 Handheld Indicator is an industrial-grade portable meter designed for spot-checking, troubleshooting and calibrating with Indigo-compatible CO₂ probes GMP252 and GMP251. Ideal for spot-checking sensor accuracy, as well as short-term data logging and process monitoring, the Indigo80 can communicate simultaneously with up to two Vaisala probes and transmitters to provide accurate measurements for a wide range of parameters.

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Optional pump for GM70

The optional GM70 pump enables pump-aspirated sampling from difficult to access areas, such as incubators and chambers. Two sampling methods are available: the handle is for handheld diffusion sampling and the GM70 pump enables pump-aspirated sampling from locations difficult to access otherwise.


Two probe inputs

The handheld meter has two probe inputs; Vaisala’s relative humidity and dew point probes can also be used simultaneously with the CO2 measurement. The GM70 has a short warm-up time and is ready for use almost immediately. It has a menu-based interface, a graphical LCD display and data logging capability.

The optional MI70 Link Windows® software in combination with a USB connection cable is used to transfer logged data and real time measurement data from the GM70 to a PC.


  • Two optional sampling methods: diffusion or pump aspiration
  • Numerical and graphical display of measurements
  • Data can be logged and transferred to PC via MI70 Link software
  • Multi-probe operation; dew point and relative humidity probes can also be connected
  • Suitable for field checking of fixed CO2 instruments
  • Short warm-up time
  • Wide selection of measurement ranges

Key Benefits


The GM70 has a numerical and a graphical display for easy viewing of the data with a logging capability. The user interface is available in nine languages.

Wide measurement ranges

The GM70 allows you to choose the measuring range that best suits your application.

Easy sampling

The GM70 incorporates two sampling methods: the handle is for hand-held diffusion sampling and the pump enables pump-aspirated sampling from locations difficult to access by other means.

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