A hydrogen concentration sensor is a device used to measure the concentration of hydrogen gas within a particular environment. These sensors are critical for ensuring the safe and efficient operation of fuel cells, as they help monitor hydrogen levels to prevent leaks and ensure optimal performance.

The key benefits of this piece of equipment is detecting leaks, system monitoring, triggering auto shutdowns to prevent accidents or damage to the system, and maintenance and diagnostics. Overall, hydrogen concentration sensors improve the safety, efficiency, reliability and compliance of fuel cell systems.