Hydrogen Gas Sensor For Hydrogen Fuel Cell Systems

Hydrogen Gas Sensor

As society progresses, there is a growing awareness of the importance of environmental protection. People increasingly prioritize environmental conservation, realizing that “green waters and mountains are as valuable as gold and silver.” If we relentlessly exploit the Earth without consideration for the environment, polluting it and disregarding the need for harmony with nature, we will eventually face dire consequences, leaving a devastated planet for future generations.

One major source of atmospheric pollution is the exhaust emissions from fossil fuel vehicles. To mitigate pollution, scientists have developed hydrogen fuel cell vehicles. Hydrogen fuel cell vehicles offer three significant advantages over traditional fuel-powered cars:

Zero emissions: Fuel cells produce only water and heat as byproducts. If hydrogen is generated from renewable energy sources such as solar panels or wind turbines, the entire cycle becomes a completely emission-free process.

Noise-free operation: Hydrogen fuel cells operate quietly, producing noise levels of approximately 55 dB, equivalent to normal conversation. This makes fuel cells suitable for indoor installations or outdoor locations with noise restrictions.

High efficiency: Fuel cells can achieve an electricity generation efficiency of over 50%. This efficiency is inherent to fuel cells, which directly convert chemical energy into electrical energy without the intermediate transformations of thermal and mechanical energy (as seen in conventional generators).

Application of Hydrogen Gas Sensors in Hydrogen Fuel Cell Systems:

Despite the numerous benefits of hydrogen fuel cell vehicles, there are still challenges to overcome before they can fully replace traditional fuel-powered cars. One critical issue is the energy source for hydrogen fuel cells: hydrogen gas. Hydrogen gas is highly combustible and has a low lower explosive limit. Additionally, hydrogen gas is the least dense known gas in the world, meaning it moves faster and can escape more easily from container openings under equivalent conditions (temperature and pressure). This means that even a slightly compromised seal on a hydrogen storage container can lead to gas leakage. Hydrogen leakage diminishes fuel cell systems’ performance and poses a significant risk of explosion and fire, endangering lives and property.

To address this safety concern, it becomes crucial to detect hydrogen gas leakage in its early stages, well before it reaches the explosive limits, and take preventive measures to ensure maximum safety for human lives and property. Since hydrogen gas is colorless, odorless, and difficult to detect directly under normal circumstances, alternative methods are required for detection.

Introducing the TGS2615-E00 Hydrogen Gas Sensor:

One recommended hydrogen gas leak detection sensor is the TGS2615-E00 sensor developed by FIGARO in Japan. The TGS2615-E00 is a semiconductor-based sensor with rapid response, low power consumption, and compact size. To eliminate the influence of interfering gases such as alcohol, the TGS2615-E00 incorporates a filtering layer and exhibits high sensitivity and selectivity specifically for hydrogen gas. It is an excellent choice for detecting hydrogen gas leaks in hydrogen fuel cell systems.

Principle of Operation:

The sensor’s sensitive element consists of an integrated heater and a metal oxide semiconductor on an alumina substrate enclosed in a standard TO-5 metal package. When the detected gas is present in the air, the higher the concentration, the higher the sensor’s conductivity. By employing a simple circuit, the changes in conductivity can be converted into a signal output corresponding to the gas concentration.

Key Parameters of the TGS2615-E00 Sensor:

Detection range: 40-4000 ppm

Circuit voltage: 5.0 ± 0.1 V

Heater voltage: 4.25 ± 0.05 V

Heater load resistance: 15 Ω

Heater power consumption: 212 ± 20 mW


Hydrogen fuel cell systems offer numerous advantages in terms of environmental friendliness, noise reduction, and high efficiency. However, safely handling hydrogen gas is paramount to prevent accidents and ensure public safety. The TGS2615-E00 hydrogen gas sensor, with its high sensitivity and selectivity, plays a crucial role in detecting hydrogen gas leaks early on, allowing for prompt action to mitigate potential risks. By incorporating such sensors into hydrogen fuel cell systems, we can further enhance the safety and reliability of this promising technology, paving the way for a cleaner and greener transportation future.

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