CO₂ Probe GMP252

for ppm-level measurements in agriculture, refrigeration, demanding HVAC, and for plant growth manufacturers

The Vaisala CARBOCAP® Carbon Dioxide Probe GMP252 is an intelligent, stand-alone, ppm-level probe. It's intended for measuring CO2 in agriculture, refrigerationgreenhouses, demanding HVAC applications, and for plant growth chamber manufacturers. It is suitable for harsh and humid CO2 measurement environments where stable and accurate ppm-level CO2 measurements are needed. The operating temperature range is -40 … +60 °C and the measurement range is 0 … 10 000 ppm CO2, and  even up to 30 000 ppm CO with a slightly reduced accuracy. 

The GMP252 can also be placed inside the Vaisala Radiation Shield DTR250 for measuring dynamically outdoor CO2 levels.

Part of the Indigo product family

The GMP252 probe is part of the Indigo product family and can also be connected to the Indigo500 and Indigo200 series transmitters to extend its features, for example, for a display or relays. The GMP252 can also be used with with the free Insight PC Software.

For spot-checking, the ideal choice is the Handheld CO2 Meter GM70.

The GMP252 replaces the following discontinued products: GMM222 and GMT222. Spare parts and accessories for the GMP222 probe are still available and can be purchased in the Vaisala online store.

Features

  • Measurement range 0 … 10 000 ppm CO2
  • Can be used for measurements even up to 30 000 ppm CO₂ with reduced accuracy
  • Intelligent, stand-alone probe with analog (V, mA) and digital outputs (RS485 with Vaisala protocol or Modbus)
  • 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
  • Compensations for background gases: O₂, and humidity
  • Sensor head heated to prevent condensation

Key benefits

Easy to use and clean

The GMP252 is a all-in-one probe, which makes it easy and fast to install. The probe is resistant to dust and most chemicals, such as, H2O2 and alcohol-based cleaning agents. The probe's surface is smooth, which makes it easy to clean.

Reliable and accurate

With the wide operating temperature range, the GMP252 is suitable for a large number of applications. The probe provides accurate and stable measurements also in varying conditions.

Product Resources

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Accurate CO2 measurements in the food and beverage industry

Whatever the end product, process, or need, the goals are similar in almost all applications: a CO2 measurement that accurately reflects the environment and meets the application requirements.

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Customer case

Why Damatex chose Vaisala sensors

In pursuit of higher profits and yields and lower operational costs, many modern greenhouses are turning to climate control companies with sophisticated networks of interconnected sensors and devices to provide real-time, autonomous environmental monitoring.

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Vaisala probes facilitate rollout of environmentally friendly refrigeration

Supermarkets all over Australia and New Zealand are benefiting from advanced carbon dioxide monitors as new natural refrigeration systems are installed in the fight against climate change. Woolworths, and its cold chain partner Emerson, therefore needed an accurate, reliable CO2 monitor that could fulfill this vital role as the Group expands the use of natural refrigerants in its stores.

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Boston IVF ensures ideal CO2 for embryos in assisted reproduction with Vaisala calibration

Boston IVF provides Assisted Reproductive Technology including in vitro fertilization (IVF) in 28 locations throughout the greater Boston area. Since 1986, reproductive treatment through Boston IVF has resulted in 90,000 births. Boston IVF’s embryo incubators are one of the most important pieces of equipment at their facilities.

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White paper

Ventilation system clears the air in turkey farm

By introducing a ventilation system based on the measurement of carbon dioxide, a Finnish turkey farmer was not only able to improve the living environment for his indoor reared turkeys but also made savings in his energy bills. The system is based on the Vaisala CARBOCAP® Carbon Dioxide Transmitter GMT222 ( *GMT222 is replaced by the GMP252 ).

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