Vaisala Indigo 200 Series host devices are part of Vaisala Indigo product family and intended for Vaisala's intelligent, stand-alone humidity probes (HMP4, HMP5, HMP7 and HMP8), CO₂ probes (GMP251 and GMP252), the vaporized hydrogen peroxide probe HPP272 and temperature probe TMP1. 

Typical applications include life science incubators, hatchers and setters, greenhouses, cold storages & refrigeration, food transportation, CO₂ safety, demanding HVAC such as animal shelters, swimming pools, parking garages, and facilities using vaporized hydrogen peroxide decontamination.

Indigo 200 allows for easy evaluation and visualization of data, also wirelessly. The installation is uncomplicated, which saves time. Also the probe types are interchangeable reducing downtime. The enclosure with an IP65 classification is safe for harsh environments and resistant to dust and most chemicals. The smooth surface of the enclosure makes cleaning easy.