The Eagle Eye HGD-3000 Hydrogen Gas and Smoke Detector with (optional) Silent Intrusion Alarm is designed for unattended battery installations or remote shelters containing gassing lead acid batteries and charging systems - most commonly found in the telecommunications and utility sectors. Other applications for hydrogen gas detection include forklift and golf cart charging areas, data centers, mission critical facilities, fire departments, and other battery charging rooms.

Lead-acid batteries on charge emit hydrogen gas after reaching the 80% recharge point. When mixed with enough air, hydrogen becomes a highly flammable gas that can ignite easily with just a spark, destroying equipment and harming personnel. The lower explosive level (LEL) for hydrogen is 4.1% by volume. The dangers of hydrogen gas explosion are eliminated by using the hydrogen gas detector. Hydrogen is colorless and odorless, the lightest of all gases and thus rises. The HGD-3000 hydrogen gas sensor should be installed at the highest, draft-free location of the room where hydrogen gas would accumulate.

The HGD-3000 hydrogen gas detector comes standard for AC power supply: 85 – 265 VAC, 50/60 Hz. Custom Options are available for DC power supply (17 – 60 VDC).

Hydrogen Gas Detection

Attach the HGD-3000 to the wall, ceiling, or optional junction box using the mounting holes at the top and bottom of the detector box. The HGD-3000 will turn on an exhaust fan when hydrogen gas levels reach 1% and will alarm at 2%. This alarm consists of a local 80db horn, a flashing red LED, and a dry contact switch closure for remote alarming.

Smoke Detection

The photoelectric smoke sensor detects minute combustion products from smoldering wire insulation, battery cases, and other material. When smoke is detected, a distinctive alarm is emitted from the 80db horn and a separate dry contact switch is activated. At this time, the exhaust fan is inhibited in order to deny the fire increased oxygen from outside air.

Temperature, Loss of Power, & Intrusion

During normal operation and in the absence of an alarm condition, an internal thermostat will turn on the exhaust fan at a preset temperature to reduce heat buildup in the room. Loss of power to the unit will also generate a dry contact alarm. Additionally, an optional infrared intrusion alarm will trigger a silent dry contact switch.

Properly installed, the HGD-3000 hydrogen gas detector is compliant with The National Electric Code (NEC) Section 480.9 (A) for ventilation of battery rooms. This is also the specified requirement for solar or wind generated power Battery Rooms. The gas detector is also compliant with The National Fire Protection Association, NFPA 2 Hydrogen Technology Code, which is more stringent. The minimum system consists of an H2 Hydrogen Gas Detector, an H2 Battery Room Forced Ventilator with Positive Airflow Shut Off, a remote firefighter’s shutdown capability, a backflow damper, and a 2% monitored alarm. This unit complies with NEC 501.125. (B), 501.105 (1)-3 and is designed for use in Class 1 Div. 2 Group B hydrogen containing classified areas.

Optional accessories for the HGD-3000 hydrogen gas detector include a steel junction box for hard-wiring to the wall or ceiling and a breakout box for easy access control. If you do not need the smoke detection, temperature, loss of power, or intrusion features, please see our HGD-2000 Hydrogen Gas Detector.