Hydrogen detectors is the smallest, lightest molecule that can be a highly explosive and flammable gas. Hydrogen (H2) gas detectors are used to protect people in environments that can be hazardous due to the presence of hydrogen and prevent dangerous accidents by detecting leaks before they cause a fire or explosion.

H2 detectors detect the presence of hydrogen in air by measuring the concentration of hydrogen ions using one of several different principles. Electrochemical, thermal conductivity, and optical sensors can all be used to detect hydrogen in air. Each of these sensor types is designed to work differently, but they all produce a response when exposed to hydrogen that can be converted into a digital output signal by a microcontroller.

Hydrogen Detectors: Ensuring Safety in Hydrogen-Fueled Environments

Electrochemical H2 gas detectors use a tin dioxide semiconductor that has low conductivity in clean air, but becomes highly sensitive to hydrogen and produces a signal output based on the amount of hydrogen in the environment. The resulting output can be used to trigger an alarm or to start a ventilation system to remove the H2 gas.

Solid-state H2 sensors are less expensive than gas detection systems based on analytical technologies, which require daily or weekly calibration processes. They are also able to operate continuously in harsh environments without the need for cleaning or replacement. Considering the operating costs and life expectancy of the H2 detector is important when determining what type of sensor is best for a given application.