CO₂ Probe GMP251

for %-level measurements in life science incubators, cold storage facilities and all demanding applications

The Vaisala CARBOCAP® Carbon Dioxide Probe GMP251 is an intelligent, stand-alone, %-level probe for measuring CO2 in life science incubators, cold storage facilities, 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.

The GMP251 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 GMP251. It has full temperature and pressure compensations of CO2 measurement – integrated temperature measurement for compensation purposes. The sensor head is heated to prevent condensation. Digital output over RS-485: Modbus & Vaisala Industrial Protocol. A calibration certificate is always included with the product

Part of the Indigo product family

The GMP251 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 GMP251 can also be used with with the free Insight PC Software.

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

The GMP251 replaces the following discontinued products: GMM221 and GMT221. Please note that spare parts and accessories for the GMP221 probe are still available and can be purchased in the Vaisala online store.

For an introduction to the product, see the video below.

Features

  • 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
  • Compensations for background gases, O₂, and humidity
  •  Sensor head heated to prevent condensation

Key benefits

Easy to use and clean

The GMP251 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 GMP251 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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Benefits of measuring CO2 reliably in cold storage applications

CO2 needs to be carefully controlled, for example, in vegetable storage facilities, fruit-ripening rooms, frozen foods, food transportation companies, supermarkets, industrial refrigerators, breweries, wineries, logistics hubs and terminals, and storage and transportation of dry ice.

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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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CO2 measurements for fermentation

Roal Ltd is one of the world´s largest enzyme companies producing enzymes for different industrial applications, for example, for baking, food, technical and feed industries. The company is jointly owned by Associated British Foods and Altia Corporation, a publicly held beverage company that focuses on wines and spirits and operates in the Nordic and Baltic countries. The biological process used to produce the enzymes is called fermentation and Roal produces enzymes in submerged fermentation units. 

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Maintaining harvest fresh apples

Controlled  atmosphere  (CA)  storage  is a  widely  used  technique  for  long-term storage of freshly picked fruits and vegetables. Historically, CA storage has been the  primary  method  for  the  long-term storage  of  apples.  Through  a  biological process  called  respiration,  apples  take in  oxygen  and  generate  carbon  dioxide, water, and heat.

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How to preserve 18,000 years of artwork

Discovered in 1940, the painted cavern of Lascaux in the Southwestern France’s Dordogne region is the most famous ornamental prehistoric cave of the world. The cave consists of a large amount of images of animals such as bisons, aurochs, deers, horses, lions, and rhinos as well as monumental hunting scenes and different objects and signs.

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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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