GasSens is a flexible component system providing a variety of options to meet individual gas detection and alarm requirements. From chemical and petrochemical plants to food processors, the GasSens system can be applied to the simplest or most complex gas detection application. Economical and low maintenance, this system is your best choice for reliable leak detection.

GasSens 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 and can be supplied with ATI’s exclusive Auto-Test automatic sensor testing system, greatly reducing operator testing requirements.

Receiver modules provide the electronic brains for the detection and alarm system. Each compact module includes a digital display of gas concentration, isolated analog output, and 4 relay outputs. Receivers may be located up to 1000 feet from sensor/transmitters for remote indication, or can provide local control functions such as valve shutoff while transmitting a 4-20 mA signal to remote displays or data loggers.

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.

A Singe point gas detector shall be supplied for monitoring the concentration of                __ (Specify Gas) in                                       (specify location).  The system shall consist of a NEMA 4X alarm module and a remote mounted gas sensor/transmitters. The gas detection system shall be ATI Series A14 or approved equal.

The alarm module shall consist of a NEMA 4X enclosure containing one modular receiver, one power supply, and an audible horn. The enclosure shall contain a hinged window to allow access to controls without tools, and shall be suitable for wall or surface mounting.

The receiver module shall provide a high intensity digital LED display of gas concentration, plus alarm indicator LED's for Warning, Alarm, and Trouble. Two programmable alarm setpoints shall be provided for warning personnel of differing levels of leakage. Gas leak alarms shall be indicated by flashing LED indicators on the alarm receiver and activation of the audible horn. The concentration of the gas shall be displayed directly in PPM units. Three alarm relays shall be provided for external alarming functions. Each alarm relay shall be independently assignable to either the low or the high alarm setpoint, and shall also be programmable for latching and/or fail-safe operation. In addition, a separate Trouble alarm shall be provided on each receiver to indicate the loss of signal from the sensor/transmitter, or to alarm the loss of sensitivity of the gas sensor if Auto-Test is supplied on the sensor. Each receiver shall provide an isolated 4-20 mA output signal proportional to gas concentration, and shall also contain remote reset input terminals to allow alarm acknowledgment from a remote location.

A sensor/transmitter shall provide the gas measurement function for the system.  The sensor/transmitter shall consist of a stable electrochemical gas sensor that shall generate a signal linearly proportional to gas concentration.  The sensor shall be close coupled to an electronic amplifier to boost the signal level, and the entire assembly shall be coated to minimize potential RFI interference. Sensor/transmitters shall transmit gas concentration data digitally to avoid electrical interference, and shall be capable of communicating over a minimum of 1000 feet of two conductor cable.

OPTIONAL: Each sensor/transmitter shall be supplied with an electrochemical gas generator closely coupled to the sensor which shall automatically generate a small concentration of gas every 24 hours to verify sensor operation. During the verification test, alarm relays shall be inhibited.  Should the sensor not respond to the gas test, the Trouble alarm on the receiver shall be activated.

The power supply in the receiver module shall be a modular design providing DC power to up to two receiver modules. A third DC output shall be provided to float charge a standby battery system to provide battery backup to the entire detection system in the event of power failure. The power supply shall be capable of operation from any voltage from 85-250 volts, AC or DC, without adjustment, and shall also contain a power failure relay for remote power failure indication.

OPTIONAL: A battery backup module shall be supplied to provide standby power to the gas detector. The battery backup module shall be housed in a NEMA 4X enclosure and shall be suitable for operating the detector for at least 4 hours in the event of power outage. Battery backup units shall contain protective circuitry to isolate the battery in the event that battery voltage drops to levels where battery damage might result.