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CO₂ Probe GMP343

for demanding measurements

The Vaisala CARBOCAP® Carbon Dioxide Probe GMP343 is an accurate and rugged probe-type instrument for ecological measurements. Typical applications include CO2 soil respiration, ambient CO2 monitoring, plant growth chambers, and OEM applications. The GMP343 incorporates a single-beam, dual-wavelength CO2 measurement with no moving parts.

The GMP343 can output both numerically filtered and raw measurement data and it can also compensate the measurement with an internal temperature measurement and user-set relative humidity, pressure and oxygen values. In combination with the handheld GM70, the GMP343 provides a tool for accurate in-situ measurement. The GM70 can be used as a display, communication and data logging device.

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Datasheet

Calibrated using ±0.5 % accurate gases

Each GMP343 is calibrated using ±0.5 % accurate gases at 0 ppm, 200 ppm, 370 ppm, 600 ppm, 1000 ppm, 4000 ppm and 2 %. Calibration is also done at temperature points of -30 °C, 0 °C, 25 °C and 50 °C. If needed, the customer can re-calibrate the instrument using the multipoint calibration (MPC) feature allowing up to 8 user-defined calibration points.

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Features

  • Excellent accuracy and stability
  • Vaisala CARBOCAP® Sensor, a silicon-based non-dispersive infrared (NDIR) sensor
  • A single-beam, dual-wavelength CO2 measurement with no moving parts
  • Compensation options for temperature, pressure, humidity and oxygen
  • Wide operating temperature and humidity ranges
  • Diffusion and flow-through models
  • For harsh environments

Key benefits

Low operating costs

The GMP343 is a small, lightweight but rugged diffusion-aspirated or flow-through CO2 probe with low power consumption and heat emission designed for use in harsh environments, especially outdoors, which reduces the operating costs.

Stable and reliable

The GMP343 has good stability both in terms of time, and temperature and also in a good stability flow.

Product documentation

Datasheets User guides More in Docs.vaisala.com

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Customer Stories

Customer case

Vaisala CARBOCAP® Sensor for measuring carbon dioxide

The CARBOCAP® story began in 1992, when micromechanical sensors were being intensively researched at Vaisala. The groundbreaking idea of miniaturizing the Fabry-Perot Interferometer (FPI) was born, leading to collaborative development work with VTT.

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Customer case

CARBOCAP® Technology aids innovative research on carbon emissions

Through studying and modeling the behavior of CO2 in urban emissions, Dr. Du and his team hope to find new and cost-effective mitigation strategies for air pollution. 

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