Physical
Dimensions	Height: 8.5″ (216 mm) x Width 7.0″ (178 mm) x Depth 4.3″ (109 mm)
Enclosure	Wall mounting grey polycarbonate with hinged cover
Conduit Connection	3/4” NPT conduit hubs, 2 provided. 1 for sensor wiring and 1 for power & relay wiring
Wiring Termination	Screw type terminal block, 14 gauge max
Power	Universal 115 VAC & 220 VAC, or 24 VDC nominal, battery backup option available
Controls	3 internal push buttons for setup, programming, and calibration. 1 external push button for alarm reset

Operating Environment
Operating Temperature	-4°F to 122°F (-20°C to 50°C)
Storage Temperature	-4°F to 158°F (-20°C to 70°C)
Relative Humidity	0 – 100% RH
Enclosure Rating	NEMA-4X enclosure, waterproof, chemical, and weather resistant.

Inputs
Direct Wired Sensors	LEL Oxygen Carbon Monoxide Hydrogen Sulfide Remote amp not required for less than 500 feet.
4-20 mA Sensors	Accepts any 4-20 mA transmitter (24 VDC, 2 or 3 wire). A wide variety of RKI/Riken sensors are available with 4-20 mA signals. (See list of detectable gases.) Wiring distances up to 5000 feet
Sampling Methods	Diffusion and sample draw heads available.

Outputs
Relays	3 relays – 10 amp rating (at 115 VAC), SPDT isolated contacts. 2 relays for gas alarms and 1 trouble relay. Relays fully programmable for: increasing or decreasing alarm, latching or self reset, normally energized or normally de-energized, time delay for alarm on and alarm off
4-20 mA	Signal output, 4-20 mA (maximum load impedance 500 ohms), per channel
24 VDC	24 VDC (400 mA max) output provided to operate sample drawing adapters or other accessories
Display	2 x 8 Alphanumeric display with backlighting.
Audible	Built-in audible alarm, 94 dB, mounted on enclosure Coded output: pulsing = gas alarm, steady = fail
Visual	3 LED’s on the front cover for alarm status indication, and malfunction

Approvals and Warranty
Warranty	One year material and workmanship