GasAlertMax XT II, Oxygen, Hydrogen Sulphide, Carbon Monoxide, LEL ORS NASCO so you’ll use less and so you’ll use less and waste less Paper towels for general purpose cleaning and drying resilient and impervious to lubricant Extra heavy follower spring insures positive priming and uninterrupted pumping action Reliably monitors for up to four gas hazards Combines straightforward one button field operation with an integrated sampling pump Tamper proof user adjustable options enable the instrument to be customized to user's application Powered by a rechargeable battery pack that provides runtime for an entire 13 hour shift Includes standard event logging and data logging