Check the listing for details. AirGas Smart-Logic 918TS Gas Analyzer -Nitride. Condition: New – Open box. Listed at 5825.00 USD. Smart-Logic 918TS Gas Analyzer PN: 918TS This advanced electronically operated 918 Series AUTO-LOGIC II changeover manifold is truly fully automatic. It provides the user with simple, intuitive operation via a color touch screen – no buttons to push and no knobs to turn. Like its forerunner, the AUTO-LOGIC, users can switch from high pressure cylinders on both sides to low pressure cryogenic containers on one side and high-pressure cylinders on the other side, or cryogenic containers on both sides with just a few screen touches. Once you have set the operating parameters, you need only change cylinders as necessary. The system takes care of everything else. There is no need to make pressure adjustments or flip a knob after the system has switched from one side to the other. Just replace the empty cylinders and open the valves. The system is now set to change in the opposite direction. These systems are truly automatic and hassle free. The AUTO-LOGIC II capabilities provide customers with the best changeover system to suit their current operation and future expanded requirements without having to buy another system. The unit is old stock, never installed.