Datasheet Contact Us 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. 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. Click here to download bid specs for USA. 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 + Show more 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. Watch the video Vaisala CARBOCAP Technology Downloads Datasheet (203.74 KB) GMP343 Carbon Dioxide Probe For Demanding Measurements Download the Datasheet Manual: 215519 Soil Adapter Kit for Horizontal Positioning of GMP343 (420.01 KB) Customer case: CARBOCAP® Technology Aids Innovative Research on Carbon Emissions (124.64 KB) Manual: 215520 Soil Adapter Kit for Vertical Positioning of GMP343 (405.06 KB) Application Note: Diffusion-based soil respiration measurements (134.72 KB) Manual: GMP343 User's Guide in English (2.01 MB) Technology Description: Vaisala CARBOCAP® measurement sensor for demanding environments (172.2 KB) Order Form: GMP343 Order Form Global (32.32 KB) Application Note: Equilibrium sampling in soil, snow and aquatic ecosystem measurements (1.89 MB) All downloads Customer Stories Customer case CARBOCAP® Technology aids innovative research on carbon emissions As human populations are increasingly urbanized, the study of air pollution has become crucial to understanding the effects of urbanization on... Read more 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... Read more Customer case Studying the changing climate in controlled environment chambers The University of Sheffield can be proud of their controlled environment facilities. The Department of Animal and Plant Sciences houses a total... Read more Customer case From the woods and into the air Understanding the carbon dioxide flux in forest ecosystems has become an important subject in the international effort to prevent global warming... Read more Services Standard calibration Repair service Need support? Need to calibrate? Sign up for news Contact us
Customer case CARBOCAP® Technology aids innovative research on carbon emissions As human populations are increasingly urbanized, the study of air pollution has become crucial to understanding the effects of urbanization on... Read more
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... Read more
Customer case Studying the changing climate in controlled environment chambers The University of Sheffield can be proud of their controlled environment facilities. The Department of Animal and Plant Sciences houses a total... Read more
Customer case From the woods and into the air Understanding the carbon dioxide flux in forest ecosystems has become an important subject in the international effort to prevent global warming... Read more