Product Description It doesn't get more budget friendly then this for an H2S Gas Detector. A low cost H2S personal gas monitor made by MSA a leader in gas detection. The MSA ALTAIR Single Gas Detector for Hydrogen Sulfide will operate for over two years maintenance free. This long lifespan, coupled with the units high performance, result in one of the most cost effective single-gas detectors on the market. Advanced design offers superior dust and water protection and high resistance to RFI. Rubberized housing and one-button operation provide the durability and ease of use users expect from MSA instruments. 95 dB audible alarm (distinct High & Low alarms) Dual LED's positioned to be seen from all angles Standard vibration alarm and standard event logging Extremely resistant to drops and impacts Rated to IP67 protection levels from dust/water ingress Warranty - Two years or 18 hours of alarm (1080 minutes) Alarm points - Low Alarm 10 ppm , High Alarm - 15 ppm Range 0-100 ppm Reviews 5 GOOD Posted by SARMAD on Jan 26th 2018 THANKS FOR YOUR QUICK RESPONSE AND COOPERATION 5 As advertised Posted by Mike on May 27th 2016 Cheapest price anywhere. Ships fast! Great service!