Gas detectors that measure the concentration of a target gas by oxidizing or reducing the target gas at an electrode and measuring the resulting current.

Principle of Operation

Electrochemical sensors operate by reacting with the gas of interest and producing an electrical signal proportional to the gas concentration.
A typical electrochemical sensor consists of a sensing electrode and a counter electrode separated by a thin layer of electrolyte.
Gas that comes in contact with the sensor first passes through a small capillary-type opening and then diffuses through a hydrophobic barrier, and eventually reaches the electrode surface. This approach is adopted to allow the proper amount of gas to react at the sensing electrode to produce a sufficient electrical signal while preventing the electrolyte from leaking out of the sensor. The gas that diffuses through the barrier reacts at the surface of the sensing electrode involving either an oxidation or reduction mechanism. These reactions are catalysed by the electrode materials specifically developed for the gas of interest. With a resistor connected across the electrodes, a current proportional to the gas concentration flows between the anode and the cathode. The current can be measured to determine the gas concentration. Because a current is generated in the process, the electrochemical sensor is often described as an amperometric gas sensor or a micro fuel cell.

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1700 intrinsically safe solid-state sensor

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The HY-OPTIMA™ 1700 is an intrinsically safe device that incorporates our patented solid-state sensor and is configured to operate in background gas streams with up to 95% relative humidity and temperatures up to 100ºC.
solid state gas sensor
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2700 in-line hydrogen process sensors

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The HY-OPTIMA™ 2700 explosion proof in-line hydrogen process sensors use a solid-state, non-consumable sensor that is configured to operate in process gas streams. The H2scan thin film technology provides a direct hydrogen measurement that is not cross sensitive to other gases.
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700 is a solid-state sensor for process gas

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The HY-OPTIMA™ 700 is a solid-state sensor that is configured to operate in process gas streams with temperatures up to 100ºC.
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720 air background gas streams

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The HY-OPTIMA™ 720 is a solid state sensor configured to operate in air background gas streams having up to 95% relative humidity and temperatures up to 65ºC
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720-GC Hydrogen Analyzing System

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H2scan’s HY-OPTIMA™ 720AS-GC Hydrogen Analyzing System is designed to detect, measure and respond to hydrogen leaks in gas chromatography (GC) systems. The hydrogen specific solid-state sensing element is designed for long life, reliable operation, and for retrofit on all GC makes and models.
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ATEX / IECEx detectors – Gas Detectors SX.EX Series

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The SXI and SX IR / EX series gas detector / transmitter is a robust detector in an industrial and / or ATEX housing for detection of different gases.
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background gas streams 1740

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The HY-OPTIMA™ 1740 is an intrinsically safe device that incorporates our patented solid-state sensor and is configured to operate in background gas streams having carbon monoxide concentrations up to 20% by volume, hydrogen sulfide concentrations up to 10% by volume, up to 95% relative humidity and temperatures up to 100ºC.
alerta 1600
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HY-ALERTA SAFETY SYSTEMS – HY-ALERTA 1600

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H2scan’s HY-ALERTA™ 1600 Intrinsically Safe Area Hydrogen Monitor provides hydrogen-specific leak detection and measurement for hydrogen concentrations as low as 4000 ppm and can be scaled to any concentration up to 5% hydrogen by volume, a range representing 10% to 125% of hydrogen’s low flammability limit.
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HY-ALERTA SAFETY SYSTEMS – HY-ALERTA 2600

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H2scan’s HY-ALERTA™ 2600 Explosion Proof Area Hydrogen Monitor provides hydrogen-specific leak detection and measurement for hydrogen concentrations as low as 4000 ppm and can be scaled to any concentration up to 5% hydrogen by volume, a range representing 10% to 125% of hydrogen’s lower flammability limit.
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HY-ALERTA SAFETY SYSTEMS – HY-ALERTA 2620

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H2scan’s 2620 Explosion Proof Area Hydrogen Monitor provides hydrogen-specific leak detection and measurement for hydrogen concentrations as low as 4000 ppm and can be scaled to any concentration up to 5% hydrogen by volume, a range representing 10% to 125% of hydrogen’s low flammability limit. The monitor is designed for either ceiling or wall mount. H2scan’s hydrogen-specific sensor technology has no cross sensitivity to other combustible gases, thus eliminating false positive alarms and ensuring safety system reliability.
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HY-ALERTA SAFETY SYSTEMS – HY-ALERTA 500

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H2scan’s HY-ALERT product line includes a range of state-of-the-art, portable hydrogen leak detectors and fixed area monitors designed to ensure safety within an enclosed or open area where there is the potential for a hydrogen leak. These products ensure around-the-clock safety by preventing explosions and provide unmatched performance.
alerta 600
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HY-ALERTA SAFETY SYSTEMS – HY-ALERTA 600

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H2scan’s HY-ALERT product line includes a range of state-of-the-art, portable hydrogen leak detectors and fixed area monitors designed to ensure safety within an enclosed or open area where there is the potential for a hydrogen leak. These products ensure around-the-clock safety by preventing explosions and provide unmatched performance.