HGD-3000 (DC) H2 Hydrogen Gas & Smoke Detector

Hydrogen Gas Detection

The HGD-3000 H2 Hydrogen Gas and Smoke Detector 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. 


  • Automatic Operation and Continuous 24/7 Monitoring
  • Highly sensitive and stable solid state H2 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
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 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
Meets UL Std. No. 61010‐1 3rd Edition and CAN/CSA‐C22.2 No. 61010‐1‐12(R2022) (DC model only)
Dimensions 178 x 120 x 55 mm (7 x 4.75 x 2.5 in)