Hydrogen is becoming a major energy storage fuel in the world. While this is a great benefit for the environment and reducing our dependence on fossil fuels, it presents a safety challenge. Hydrogen gas is flammable in concentrations greater than 4% and poses a threat for explosions in confined spaces. Fortunately, hydrogen detectors can help monitor for potential leaks and keep workers safe in these potentially hazardous environments. URL

Hydrogen gas detectors are commonly seen in applications related to alternative fuel vehicles, battery storage centers and hydrogen car charging stations. They can also be found in oil refineries during hydrocracking processes that reduce heavy petroleum oils into lower molecular weight components. Hydrogen is used as a coolant for power generation and in the chemical industry to make ammonia (NH3) and fertilizer. These uses have resulted in increased production, creating a growing demand for hydrogen detection instrumentation.

Hydrogen Detector Calibration: Maintaining Accuracy and Performance

Hydrogen detectors are available in handheld portable units and wall-mounted models, depending on the application. Many feature an electrochemical sensor to detect hydrogen. These sensors are comprised of a thick layer of semiconductor material, called “matrix” and an upper coating of catalytic additives that accelerate the hydrogen oxidation reaction on the matrix surface. The hydrogen oxidation reaction produces a voltage that is proportional to the amount of hydrogen in the sensor’s environment. This signal is translated into a digital readout on the display unit. The sensor and monitor should be bump tested and calibrated regularly to ensure a reliable and accurate reading.

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