Macurco™ Hydrogen Gas Detectors

Early Warning Detection of Highly Flammable Hydrogen Gas

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What's special about these hydrogen detectors?

  • Monitors for potential buildup of hydrogen gas for early warning and prevention of hazardous and unsafe conditions
  • Reduces energy costs when combined with a ventilation control panel or energy management system, by limiting exhaust fan activation to only the times when gas is detected
  • Long life, solid-state sensor provides reliable service for up to 7-10 years
  • Click for More Features

Hydrogen gas buildup caused from burning fuel or a leak in a coolant line can become a highly dangerous situation if not contained or detected in time. When mixed with enough air, hydrogen becomes a highly flammable diatomic gas that can ignite easily with just a spark, causing an almost invisible flame that can easily harm anyone or anything it comes into contact with. More


3M-HD-11 Macurco Hydrogen Gas Detector with Low LEL Alarm Relay 4.5" L x 5" W x 1.625" D 1 lb

Using a Macurco™ Hydrogen Gas Detector will allow you to monitor storage rooms and/or facilities that house forklifts, golf carts, backup power supplies, and battery charging stations for hazardous hydrogen gas buildup. When the gas level reaches around 10% of the lowest amount of gas needed for a fire, the Macurco gas detector will automatically trigger your early warning or alarm system, giving time for building evacuations and containment.

  • HD-11 is a low voltage SPDT relay output hydrogen gas detector designed to be paired with a third party ventilation and detection control panel
  • Alarm relay is factory set to activate at 10% of the Lower Explosive Level (LEL) of hydrogen gas, to provide ample time for finding and containing the gas leak
  • Mounts in a standard 4 x 4 electrical box or flat on a wall for fast and easy installation
  • Made in the USA


Part # 3M-HD-11
Size 4.5" L x 5" W x 1.625"D
Weight 1 lb
Color White
Voltage 12 to 24 VAC or VDC
Current 60 mA @ 24V, 30 mA @ 12V
Relay Rating 0.2 Amp, 3 VA
Operating Temperature 0° to 150° F






Control PanelMacurco™ Detection and Ventilation Control Panel
Designed to trigger exhaust fans only when harmful gases are detected, this control panel prolongs fan life and cuts energy costs, while ensuring safe air in garages, warehouses, and maintenance facilities.

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Plug-In detectorsKidde Direct Plug-In Carbon Monoxide Detectors
These models make protecting your family easy. Simply plug them into an available outlet and you're ready to go. There is no need to cut holes in your walls or do any intense wiring. Some even feature a battery backup, so if the power goes out the unit will continue to monitor for carbon monoxide.

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