This listing is for the ATi Portsens111 Gas Leak Detector. The unit is in full working condition and is ready for immediate use. The ATI PortaSens III is a portable, handheld gas leak detector designed for locating and measuring gas leaks across a wide range of environments—from chemical plants to pharmaceutical labs, food processing facilities, and confined spaces. Key features include interchangeable smart sensors that attach pre-calibrated smart sensor modules allowing detection of 30 to over 60 different gases depending on configuration. Swapping sensors takes under a minute and requires no user calibration. Built-in sampling pump and flexible wand enable pinpoint detection of leak sources via one-hand operation. Color touch-screen display features a backlit, graphic or touch-enabled LCD for easy reading in all lighting conditions. Data logging and connectivity includes a 4 GB internal data-logger capturing millions of data points with log intervals programmable from 1 to 60 minutes and USB connectivity for data transfer. Power options include rechargeable NiMH D cell battery or traditional alkaline D-cell batteries. Offers both visual and audible alarms including low flow and low battery warnings plus multiple gas concentration thresholds. The D16 PortaSens III can detect a broad spectrum of gases including toxic gases (hydrogen sulfide, hydrogen peroxide, formaldehyde, chlorine, sulfur dioxide, ammonia), common industrial gases (oxygen, ozone, carbon monoxide, carbon dioxide), and specialty/exotic gases (arsine, diborane, ethylene oxide, phosphine, silane, bromine, iodine, and more).