B12 2-Wire Modular Gas Detector Description
ATI's B12 2-Wire Modular Gas Detector is a flexible component system providing a variety of options to meet individual gas detection and alarm requirements. The systems gas transmitters are loop-powered instruments that transmit a 4–20 mA signal linearly proportional to gas concentrations. Operated from a 24 VDC power supply, the gas transmitter will drive loads up to 675 ohms— sufficient for most gas monitoring applications. Alternatively, the unit can operate at 12 VDC — with reduced output load — for applications requiring battery operation.
Gas transmitters are normally supplied with the sensor close coupled to the enclosure. However, for special applications, the unit can be supplied with separate gas sensors that can be located up to 25 feet from the transmitter. Gas sensor duct mounting adapters and sensor flowcells can also be provided for specific applications.
The B12 gas detection systems consist of individual modules that can be located where required. Sensor/transmitters, located in the area where gas leakage or buildup might occur, provide the basic measurement for the system. Sensor transmitters are available in either NEMA 4X or explosion-proof versions.
Universal power supply modules provide DC power to receivers. The power supply is housed in a compact module similar to the receiver, and will accept inputs from 85 to 265 volts, AC or DC, without adjustment. The power supply also provides a power failure relay and charging for an optional battery back-up unit.