NTM Hydrogen Alarm System

Product Code: 6211765


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The NTM Hydrogen Alarm System is a complete hydrogen monitoring solution designed to instantly improve safety in any environment.  This comprehensive system includes the patented NTM SenseH2 hydrogen sensor, which boasts a highly sensitive, selective, and rapid response to low levels of hydrogen in the ambient air.  When hydrogen concentration levels are detected within the Lower Flammability Limit (LFL), the system will produce audible and visual alarms to prevent further exposure to hydrogen and all hydrogen related accidents.

Product Features:

• Two mechanical relays providing 10 A at max switching voltage
• High sensitivity and selectivity to hydrogen
• Rapid response & recovery times
• 120-240 VAC power connection, or 12-48 VDC (be sure to ground your connection)
• Compact and rugged design
• Insensitive to CO and CH4
• Works in a variety of environments
• Durable and stable for long term operation
• Lowers cost of ownership

The NTM Hydrogen Alarm System is intended for use as a hydrogen gas detection and monitoring system in the range of 0.25 to 4% hydrogen in air.

Typical Applications:

• Stationary fuel cells
• Hydrogen refueling stations
• Hydrogen generation (electrolyzer) systems
• On‐site fuel reforming systems
• Laboratory monitoring


Composite Control Box: A Composite Control Box with connections for input of one or two hydrogen sensors, powered by 100VAC – 240VAC, or 12-48VDC, three LED indicator lights, dedicated alarm system circuit board, internal audible alarm, two internal sealed mechanical relays and built in diagnostics for LEDs, audible alarm and relays.


​Sensor: The NTM SenseH2 Hydrogen Sensor is designed specifically for monitoring hydrogen. This ceramic sensor delivers a highly sensitive and rapid response to the presence of hydrogen in ambient air, creating a new level of safety and protection in your work environment. The compact and rugged design allows it to easily be incorporated into various systems, such as fuel cell powered vehicles, or function as a stand-alone room monitoring device.


​Alarm Sensor Connector: 25 ft. shielded communication cable with connectors for control box and sensor. Longer cable lengths are available upon request.


NTM SenseH2 Hydrogen Sensor Technical Specifications

SenseH2 Datasheet

Hydrogen Sensor Flow Sensitivity

Hydrogen Alarm System Installation Guide


Typical Calibration:

Sensor Dimensions:

Alarm Box Dimensions:

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