Measurement and Testing
Hydrogen leak detection and monitoring - Solid-State area monitors provide superior detection
Aug 09 2018 Read 952 Times
Although hydrogen gas has a well-earned reputation for being dangerous, due to its low flammability limit and low ignition energy, its tendency to disperse rapidly in fact makes it relatively easy to detect. Despite being odorless, colorless, and tasteless, good solid-state detectors that are not affected by other combustible gases can be easily installed in key locations for safe operation.
Regardless of whether hydrogen is being generated (for example, when lead-acid batteries are charging or in an electrolyzer), consumed (for example, in a hydrogenation process or a fuel cell), or circulated like in a hydrogen cooled generator, monitoring the local area for potentially dangerous leaks is critical. Fortunately, installing hydrogen detectors like the H2scan HY-ALERTA™ 600B area monitor above potential
sources of leaks, near critical infrastructure, or along pipes is easy. Proper installation of monitors near air vents, in dead zones or overhangs, or
anywhere hydrogen might collect helps ensure rapid detection of potentially explosive concentrations.
The limitations of existing technologies are well known. Detectors using catalytic beads suffer from false alarms in the presence of gases like carbon monoxide, have a lifespan of only a few years, and degrade over time. Thermal conductivity detectors typically require a reference gas and have a limited detection range.
Unlike those products, H2scan uses a hydrogen-specific palladium-nickel solid-state sensor that does not wear out, minimizes false alarms, and measures from 10% to 125% of hydrogen’s lower explosive limit of 4% hydrogen in air. The H2scan hydrogen monitors are designed to be installed on ceilings or walls, or even poles. The use of multiple relatively inexpensive H2scan monitors throughout a building helps keep workers and structures safe. Using the RS-232 or optional RS-422 signal means the monitors can even be installed hundreds of feet from the controller.
Relays can be set to trigger an alert whenever a hydrogen concentration of 1% by volume is reached, so that appropriate safety actions like opening vents, turning on fans, or turning off hydrogen sources can be taken. A second relay can trigger an alarm when 2% hydrogen is detected to avoid a potentially dangerous buildup of gas.
H2scan’s HY-ALERTA™ family of hydrogen specific area monitors detects hydrogen in air. The unique solid-state, non-consumable sensor technology provides real-time continuous hydrogen monitoring with no cross-sensitivity to other gases in the environment, particularly other combustibles. No reference gases are required to reliably and accurately indicate the presence of hydrogen with fast response times.
Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.
In This Edition Analytical Instrumentation - Range of viscometers for oils and fuels - Tackling viscosity measurement at refineries - Krebs stormer digital viscometer Fuel For Thought...
View all digital editions
Jun 26 2019 Basel, Switzerland
Jun 26 2019 Aveiro, Portugal
Jun 26 2019 Algiers, Algeria
Jun 27 2019 London, UK
Jul 03 2019 Tokyo, Japan