Vaisala GMP251 Carbon Dioxide Probe


The Vaisala CARBOCAP® Carbon Dioxide Probe GMP251 is an intelligent, stand-alone, %-level probe for measuring CO2 in life science incubators, cold storages, fruit and vegetable transportation, and in all demanding applications where stable and accurate percentage-level CO2 measurements are needed. The operating temperature range is -40 … +60 °C and the measurement range is 0 … 20%CO2.



  • Measurement range 0 … 20 %CO₂
  • Intelligent, stand-alone probe with analog (V, mA) and digital (RS485) outputs
  • Superior long-term stability with the 2nd-gen proprietary CARBOCAP® technology
  • Wide operating temperature range -40 … +60 °C
  • IP65 classified housing
  • Full temperature and pressure compensations
  • Integrated temperature measurement for CO₂ compensation purposes


  • Life science incubators
  • Cold storages
  • Fruit and vegetable transportation