HGD-3000i H2 (AC) Hydrogen Gas & Smoke Detector with Intrusion Alarm

Hydrogen Gas Detection

The HGD-3000 H2 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. 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 build-up 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.


  • Automatic Operation and Continuous 24/7 Monitoring
  • Highly sensitive and stable solid state hydrogen sensor
  • Sensitive photoelectric smoke detector module
  • Internal thermostat for automatic exhaust fan control at 40°C (104°F) with ±5° adjustable range
  • Save insurance costs – reduce insurance premiums when placed in battery charging rooms
Detection Hydrogen Gas, Smoke, Temperature, Intrusion
Alarms 10A Relay for Exhaust Fan, 1A Relay for Loss of Power, 1A Relay
for Smoke Alarm, 1A Relay for Intrusion, 1A Relay for 2% H2
Relay Connections RJ45, Punch-Down Block
Mounting (4) 4.5 mm (3/16 in) screws
Operating Environment Temperature: -10 – 40 °C (14 – 104 °F)
Power Requirements Standard: 85 – 265 VAC, 50/60 Hz
Optional: 17 – 60 VDC
Compliance IEEE Standard 450; National Protection Agency (NFPA) Article
64; NFPA 2: Hydrogen Technologies Code; Uniform Building Code
(UBC) Section 6400; National Electric Code (NEC) Section 480.9
(A); NEC 501.125 (B); NEC 501.105 (1)-3 – use in Class 1 Division
2 Group B
Dimensions 178 x 120 x 55 mm (7 x 4.75 x 2.5 in)