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The Vaisala CARBOCAP GMP252 is a smart probe that measures carbon dioxide (CO2) in a variety of applications such agriculture, refrigeration, greenhouses, plant growth chambers and demanding HVAC environments where stable and accurate ppm-level CO2 measurements are needed. The GMP252 can be combined with the DTR250 or DTR250A shield to measure CO2 outdoors. The GMP252 has a new type of infrared (IR) light source that is used instead of the traditional incandescent light bulb, extending the lifetime of the sensor. The GMP252 has a full-scale measurement range of 0 ... 10,0000 ppm CO2, but can be used at any range in between. The GMP252 operating temperature range is -40 ... +60 °C (-40 ... +140 °F) and the probe housing is classified as IP65.
| Measurement range | 0 ... 10,000 ppm CO2 (up to 30,000 ppm CO2 with reduced accuracy) |
Measurement accuracy | At 25 °C and 1013 hPa: 0 ... 3000 ppm CO2: ±40 ppm CO2, |
| Operating temperature | -40 ... +60 °C (-40 ... +140 °F) |
| Operating pressure | Compensated 500 ... 1100 hPa, Operating < 1.5 bar |
| Operating voltage | 12 ... 30 VDC digital output, 12 ... 30 VDC voltage output, 20 ... 30 VDC current output |
| IP rating | IP65 |
| Analog outputs | 0 ... 5/10 V (scalable), min load10 kΩ, 0/4 ... 20 mA (scalable), max load500 Ω |
| Digital outputs | RS-485, Modbus |
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Ideal for agriculture, refrigeration, greenhouses, and demanding HVAC applications where stable and accurate ppm-level CO2 measurements are needed.
