Self Checking Gas Sensors 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. Applications include: Chemical plants; pulp & paper mills; semiconductor fabrication; food processing; water treatment; mineral processing; wastewater treatment; parking facilities; gas processing; and petroleum refining. Acid Gases Alcohol Ammonia Arsine Bromine Carbon Monoxide Chlorine Chlorine Dioxide Combustible Gas Diborane Ethylene Oxide Fluorine Formaldehyde Germane Hydrogen Hydrogen Chloride Hydrogen Cyanide Hydrogen Fluoride Hydrogen Sulfide Hydrogen Peroxide Hydrogen Selenide Iodine Nitric Oxide Nitrogen Dioxide Oxygen Ozone Phosgene Phosphine Silane Sulfur Dioxide Minimum Range Maximum Range

Receiver Module Receiver modules provide an interface latching or non-latching oper- between the detection system and external alarming and data logging Trouble Alarm & Relay: requirements. One module is used with each sensor/transmitter and includes a input be lost, a trouble light (LED) on the front panel will flash and an associated relay will activate. For those sys- tems equipped with the sen- sor Auto-Test feature, this high intensity (sunlight readable) alarm will also activate if the mode for outdoor use or in normal sensor does not respond to mode for indoor applications. • Analog Output:...

Sensor/Transmitter GasSens gas detection systems employ electrochemical sensors developed rent pulse position technique to send information to the receiver over a two electrochemistry and sensor design wire connection. The receiver connec- provides the foundation for leak detec- tion is not polarity sensitive, virtually tion systems that perform continuously eliminating the possibility of incorrect with minimal maintenance. Sensors are transmitter wiring. Sensor/transmitters rated for ambient temperatures from can be located up to 1000 feet from -25° to +50°C, allowing both indoor Standard sensor/transmitter...

Power Supply Module To meet the needs of users throughout which are designated for receiver mod- ule connection. A third connection is pact universal power supply in a DIN provided to automatically charge rail module similar to the receiver. The the optional external battery back- power supply will accept any AC or DC up system. The power supply mod- input from 85 to 265 volts, without ule is protected by a fuse conve- adjustment. No jumper changes or niently located in a removable selection switches are required, and holder accessible from outside the large variations in input voltage do not...

Receiver & Power Supply Enclosures A variety of NEMA 4X enclosures are Single Module Enclosure: Houses a available to house receiver and power single receiver module for use in DC supply modules. ATI offers standard powered applications where the user enclosures to house up to 6 modules, supplies the DC power to the system. and can supply large enclosures for systems requiring more points of Two Module Enclosure: Houses two detection. System integrators can use standard 35 mm DIN rail mounting power supply. Normally used for single modules in their own enclosure. point AC powered detectors. Three...

Specifications Receiver Module Construction Display: Input: Output: Alarms: Alarm Indicators: Indicator Function: Alarm Relays: Relay Function: Relay & Indicator Reset: Trouble Alarm: Trouble Function: Gas Indicator: Mounting: Electrical Connection: Module Enclosure: Size: Operating Temperature: Humidity: Power: 4 digit LED, sunlight readable Digital signal, 2 wire connection to remote sensor/transmitter Isolated 4-20 mA DC, 1000 ohms maximum load Two adjustable concentration alarms, set points adjustable from 5-100% of range High intensity LED bars for WARNING (low setpoint) and ALARM (high...

Sensor/Transmitter Measurement: Transmitter Type: Sensor: Zero Drift: Enclosure: Optional Enclosure: Gas type and range customer specified Two wire system, current pulse position signal Electrochemical gas diffusion type (manufactured by ATI) Generally ±5% of value, but limited by available calibration of gas accuracy. Sensor dependent but normally less than 2% per month, non-cumulative NEMA 4X polystyrene Explosion-proof cast aluminum, Class I, Division I, Group B, C, & D Electrical Connection: Connection Distance: Operating Temperature: Humidity: Option: Size (Sensor Transmitter with Auto-Test):...

Ordering Information Specify modules using the coding system below. Generate a part number for the receiver and sensor/transmitter. Then select power supply and enclosure options as required. Model A14/A11-CC-DDDD-E-F Alarm Module: s s - s s s s - s - s Receiver Module + Sensor/Transmitter Suffix CC - Gas Type - Standard range shown in parentheses 10 - Bromine (0-2 PPM)* 39 - Alcohol: Consult Factory *Indicates Auto-Test option available for standard range or below. Options and System Enclosures Suffix DDDD - Range Code the measurement range using a four digit number. The standard ranges are...