The 3M™ Single Gas Detector 110 Series provides fast, reliable information on selected target gases while reducing maintenance costs. The single unit gas detector is user-friendly and affordable. It can be clipped to your pocket, belt or hardhat to go where you go. Key features of the 110 Series include: lightweight and compact design  4.1 oz. (115 g), easy operation 1-button data entry, three alarm indicators  vibrating, audible (85 dB) and visual, long-lasting lithium battery, measure CO, HS, OX and intrinsically safe rated CSA (US)  Class 1, Groups A, B, C, D; T4A.WARNING: This instrument helps monitor for the presence and concentration level of certain specified airborne gases. Misuse may produce an inaccurate reading which means that higher levels of the gas being monitored may be present and could result in overexposure and cause sickness or death. For instruments with an oxygen sensor installed, misuse may produce an inaccurate reading where lower or higher levels of oxygen may be present and cause sickness or death. Each person using this equipment must read and understand the instructions in the User Instructions before use. Use of this equipment by untrained or unqualified persons, or use that is not in accordance with the User Instructions may adversely affect product performance and result in sickness or death. For proper use, see supervisor or User Instructions, or call 3M OH&ESD Technical Service in the U.S.A. at 1-800-243-4630. In Canada, call 1-800-267-4414.