GMP252 CO2 Probe for ppm-Level Measurements - Vaisala Online Store

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GMP252 CO2 Probe for ppm-Level Measurements

The Vaisala CARBOCAP® Carbon Dioxide Probe GMP252 is an intelligent, stand-alone probe for measuring carbon dioxide in agriculture, refrigeration, greenhouses and demanding HVAC applications. It is suitable for harsh and humid CO2 measurement environments where stable and accurate ppm-level CO2 measurements are needed.

The GMP252 is based on Vaisala’s unique, second-generation CARBOCAP® technology that enables exceptional stability. A new type of infrared (IR) light source is used instead of the traditional incandescent light bulb, which extends the lifetime of the GMP252.

The GMP252 incorporates an internal temperature sensor for compensation of the CO2 measurement according to ambient temperature. The effects of pressure and background gas can also be compensated for. The measurement range is 0 ... 10 000 ppmCO2 and the sensor can be used for measurement even up to 30 000 ppmCO2 with reduced accuracy.

The operating temperature range of the probe is wide (-40…+60 °) and the probe housing is classified as IP65. Condensation is prevented as the internal sensor head is heated.

The GMP252 is resistant to dust and most chemicals, such as, H2O2 and alcohol-based cleaning agents.

The package includes:

  • GMP252 probe
GMP252 CO2 Probe for ppm-Level Measurements
Vaisala CARBOCAP® Carbon Dioxide P​robe GMP252
Standard delivery time for single unit: 1 week
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Warranty: 24 months
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Detailed information

Measurement parameter(s)Carbon dioxide
Measurement range0 ... 10 000 ppmCO2
Measurement accuracyat 25 °C and 1013 hPa:
0 ... 3000 ppmCO2 ±40 ppmCO2
3000 ... 10 000 ppmCO2 ±2% of reading
Up to 30 000 ppmCO2 ±3.5% of reading
Operating temperature-40 ... +60 °C
Operating voltage12 ... 30 VDC digital output
12 ... 30 VDC voltage output
20 ... 30 VDC current output
Analog outputs0 ... 10 V (scalable)
4 ... 20 mA (scalable)
Digital outputsRS485,Modbus RTU
Housing classificationIP65
Links See full specifications on Vaisala.com
Download user guides and other product documents on Vaisala.com


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