The GX-3R Pro is the largest 5-gas detector that fits in the palm of your hand (2.9" W x 2.6" H x 1.06" D).
It monitors and displays 5 different gases simultaneously. In addition to monitoring the standard confined space gases LEL, O2, CO and H2S, the
GX-3R Pro has a 5th channel where you can add infrared or toxic gas sensors (cyanide sensors). Hydrogen (HCN) and Nitrogen Dioxide (NO2) are currently available for the GX-3R Pro). Two of the four sensor locations have interchangeable sensors providing flexible configurations, which can easily be changed in the field.