The ALTAIR single-gas detector from MSA Instrument Division features three sensor options: carbon monoxide, hydrogen sulfide and oxygen. Carbon monoxide and hydrogen sulfide versions can operate for more than two years. The advanced design offers superior dust and water protection and high resistance to RFI. A rubberized housing and one-button operation provide durability and ease-of-use. The triple-alarm system featuring two bright LEDs, a piercing audible alarm and a vibrating alarm helps ensure that no alarm condition goes unnoticed. The ALTAIR detector automatically records the last 25 alarm events.