GTR 196 EX (GOW) H2 IN O2 GTR 196 EX (GOW) H2 in O2 -Sensor element made of stainless steel enclosure- Gas transmitter with thermal conductor sensors, for measuring noxious gases and vapours, for installation in normal surroundings, for installation in explosion endangered areas, for connection to the measuring unit. Protection class: IP54 Supply voltage 15VDC - 30VDC, Output 4-20 mA; 3-wire techniques; Measuring ranges: 0 - 2 Vol% H2 in O2,