Indigo 202 transmitter with CO2 probe, Display, Modbus, Relays

The Indigo 202 is a transmitter with digital Modbus communications. It is a host device for Indigo compatible probes. A display and two relays are available.

Probes can be connected directly or with a remote cable (available as accessories) to the Indigo 202. User configuration and temporary viewing of data is easy and convenient with a wireless browser-based user interface.

The GMP251 and GMP252 are intelligent probes. They are ideal for measuring carbon dioxide in agriculture, refrigeration, greenhouses and demanding HVAC applications. They are suitable for harsh and humid CO₂ measurement environments where stable and accurate CO₂ measurements are needed.

These probes are based on Vaisala’s unique, second-generation CARBOCAP^® technology that enables exceptional stability. The measurement range is:

GMP252: 0 ... 20000 ppmCO₂
GMP251: 0 ... 20%CO₂

See all Indigo probes
See all Indigo Transmitter bodies

The package includes:

GMP251 or GMP252 probe
Indigo 202 transmitter

Note that probe and transmitter may be shipped separately.

Watch the video to learn more about the Indigo 200 Series host device:

Indigo 202 transmitter with CO2 probe, Display, Modbus, Relays

Indigo 202 transmitter with CO2 probe GMP252 for agriculture, refrigeration, greenhouses and demanding HVAC applications.

Standard delivery time for single unit: 1 week
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Warranty: 24 months
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Detailed information

Measurement parameter(s)	Carbon dioxide
Measurement range	GMP251: 0 ... 20 %CO₂ GMP252: 0 ... 20000 ppmCO₂
Measurement accuracy	at 25 °C and 1013 hPa: GMP251: at 5% CO₂ ±0.1%CO₂ at 0 ...8% CO₂ ±0.2%CO₂ at 8 ...20% CO₂ ±0.4%CO₂ GMP252: 0 ... 3000 ppmCO2 ±40 ppmCO₂ 3000 ... 10 000 ppmCO₂ ±2% of reading Up to 30 000 ppmCO₂ ±3.5% of reading
Operating temperature	-40 ... +60 °C
Operating voltage	24 VDC
Digital outputs	Modbus RTU over RS485
Housing classification	IP65
Links	See full specifications on Vaisala.com Download user guides and other product documents on Vaisala.com

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