Once turned on, Model BW Clip4 can operate continuously for two years without the need to change sensors or charge batteries. Suited for oil and gas, heavy manufacturing, confined space and other applications, the portable gas monitor reduces maintenance costs by eliminating repair work and the need to stock additional sensors and spare units. Benefits include two years of battery runtime without recharging or changing batteries; small size; the functionality of a multi-gas detector; and improved safety compliance. Using non-dispersive infrared (NDIR) technology, the detector consumes 1,000-times less battery power than a catalytic bead (pellistor) sensor, the traditional technology used to detect flammable gases in a portable device. Other features include simultaneous monitoring of H2S, CO, O2 and combustibles (LEL), and real-time display for instant gas readings even in nonalarm conditions, along with current gas concentration level and changes in atmospheric conditions.