Beacon 110


The Beacon 110 is a powerful, low cost fixed system controller for one point of gas detection. It is microprocessor controlled, versatile, simple to install and operate, and priced to be the industry’s best value single gas detection controller. It is capable of accepting RKI sensors directly for LEL level combustibles, Oxygen, Hydrogen Sulfide, or Carbon Monoxide. The Beacon 110 can also accept any 4-20 mA transmitter (2 or 3 wire, 24 VDC). Sensors can be mounted directly at the Beacon 110 housing, or can be wired remote from the controller.

The 10 amp rated relays are strong enough to directly power external alarms and horns. The digital display has backlighting and simultaneous readout of the gas type and concentration.

The Beacon 110 is also housed in a NEMA 4X rated case for a weather tight seal. This case design complies with lock out / tag out standards and can be fully secured. An external reset switch allows the alarm to be silenced from outside of the controller housing. The Beacon 110 ships complete with a wall mounting kit for easy installation.

RKI offers the industry’s widest selection of standard and toxic gas detection sensors, which can be utilized with the Beacon 110, providing gas monitoring protection for almost any application.


Low cost versatile solution
Compact, weatherproof, NEMA 4X enclosure
115/220 VAC or 24 VDC operation
Long life sensors (2+ years typical)
Accepts RKI LEL/O2/H2S/CO direct connect sensors
Accepts any 4-20 mA transmitter
Audible alarm with reset button
Two programmable alarm levels
Built-in trouble alarm with relay
Relay rating 10 amps, form C
Provides 4-20 mA output


Petrochemical plants
Water & wastewater treatment pants
Pulp & paper mills
Gas, telephone, & electric utilities
Parking garages
Manufacturing facilities



General Specifications

DimensionsHeight: 8.5″ (216 mm) x Width 7.0″ (178 mm) x Depth 4.3″ (109 mm)
EnclosureWall mounting grey polycarbonate with hinged cover
Conduit Connection3/4” NPT conduit hubs, 2 provided. 1 for sensor wiring and 1 for power & relay wiring
Wiring TerminationScrew type terminal block, 14 gauge max
PowerUniversal 115 VAC & 220 VAC, or 24 VDC nominal, battery backup option available
Controls3 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 Humidity0 – 100% RH
Enclosure RatingNEMA-4X enclosure, waterproof, chemical, and weather resistant.
Direct Wired SensorsLEL Oxygen Carbon Monoxide Hydrogen Sulfide Remote amp not required for less than 500 feet.
4-20 mA SensorsAccepts 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 MethodsDiffusion and sample draw heads available.
Relays3 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 mASignal output, 4-20 mA (maximum load impedance 500 ohms), per channel
24 VDC24 VDC (400 mA max) output provided to operate sample drawing adapters or other accessories
Display2 x 8 Alphanumeric display with backlighting.
AudibleBuilt-in audible alarm, 94 dB, mounted on enclosure Coded output: pulsing = gas alarm, steady = fail
Visual3 LED’s on the front cover for alarm status indication, and malfunction
Approvals and Warranty
WarrantyOne year material and workmanship

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