The OLCT 100 C is an explosion proof gas detector for continuous monitoring ofcombustible gases and vapors in ambient air. The transmitter uses microprocessortechnology to convert the signal from a catalytic bead sensor to a 4 to 20 mA analogsignal output.The transmitter features a display and three programmable relays (SPDT) for controllingexternal equipment such as sirens, valves or switches. The transmitter providesan industry standard 3-wired, 4-20mA output for connection to a control systemor PLC. Three relays can be easily set to latching/non-latching for safety controlsystem.The unit is designed for one-man calibration, neither measurement tool (Multi-meter)nor potentiometer adjustments are required. Maintenance, calibration, setup andinstrument configuration are easily accomplished by using the non-intrusive magneticwand. This allows a single user to undertake routine maintenance without needingto access internal components.The transmitter is housed in a cast aluminum explosion-proof enclosure. The unit is typically powered with a 24 VDC (15-28VDC) power supply and outputs a 0-24 mA signal. OLCT 100 C is suitable for use in Zone 1 or 2 hazardous areas.