Designed for superior lifespan—patented sensors operate for over two years—and high performance, the ALTAIR Single-Gas Detector is the smart choice for market-leading, cost-effective gas monitors. Features sensor options for carbon monoxide, hydrogen sulfide, and oxygen coupled with LED/audible/vibrating alarms. Superior dust/water protection, high RFI resistance, and one-button operation provide heightened safety, plus increased durability and ease-of-use. Sensor options for CO, H2S, and O2 Patented electrochemical sensors and MSA-built button sensors Stainless steel and solid electrolyte construction virtually eliminate sensor leakage Automatically records the last 25 alarm/test events and can communicate data by connecting to MSA Link via built-in IR communication port No-miss triple alarm system includes bright flashing LEDs, piercing audible alarm, and an internal vibrating alarm Rubberized armor housing and one-button operation for maximum durability and simplicity