GMP251 CO2 Probe for INDIGO transmitter, % range - Vaisala Online Store

/ Online Store

Your location
appears to be United States.

GMP251 CO2 Probe for INDIGO transmitter, % range

The Vaisala CARBOCAP® Carbon Dioxide Probe GMP251 is an intelligent probe for use with INDIGO transmitter bodies. This configuration is optimized for Indigo display, please see another configuration here in case you want to use the GMP251 probe as a stand-alone general purpose probe.

This probe is ideal for measuring carbon dioxide in life science incubators, cold storages, fruit and vegetable transportation,and in all demanding applications where stable and accurate %-level CO2 measurements are needed.

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.

The GMP251 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 ... 20 %CO2 and the sensor performance is optimized at 5 %CO2 measurement.The measurement range is selectable between 0 ... 2 and 0 ... 20 %CO2. The analog outputs of an INDIGO transmitter body will automatically scale according to the selected probe measurement range.

See Indigo compatible products

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 GMP251 is resistant to dust and most chemicals, such as, H2O2 and alcohol-based cleaning agents.

The GMP251 replaces the following discontinued products:GMM221, GMP221, GMT221.

Please note that spare parts for the GMP221 probe are still available and can be purchased in the Vaisala online store.

The package includes:

  • GMP251 probe
GMP251 CO2 Probe for INDIGO transmitter, % range
Vaisala CARBOCAP® Carbon Dioxide P​robe GMP251 for use in life science incubators, cold storages, fruit and vegetable transportation.
Standard delivery time for single unit: 1 week
About delivery times »
Warranty: 24 months
About warranty »
Choose measurement range

Part no. Choose options first

Quantity Price

Detailed information

Measurement parameter(s)Carbon dioxide
Measurement range0 ... 2 / 3/ 5/ 10/ 20 %CO2
Measurement accuracyat 5% CO2 ±0.1%CO2
at 0 ...8% CO2 ±0.2%CO2
at 8 ...20% CO2 ±0.4%CO2
Operating temperature-40 ... +60 °C
Operating voltageProvided by INDIGO transmitter
Digital outputsDigital protocol for INDIGO transmitter
Housing classificationIP65
Links See full specifications on
Download user guides and other product documents on

Related Products and Accessories

Did not find products or accessories and spares parts you were looking for?
Online Store has a limited selection of our products. See our full product offering»
Discuss your specific needs with our knowledgeable Sales Engineers. Find your local sales contact»

Shopping cart
Total 0,00 €

About the Online Store

Contact Us

Payment Methods

Trusted Commerce