8 Gas Detection Portable, precise and dependable leak-tightness testing system for hydrogen fuel cells


It is widely anticipated that hydrogen, used as an energy carrier, will play a signifi cant role in the energy transition which will reduce our use of fossil fuels. For example, it can store excess renewable energy generated by solar panels or wind turbines. Electric batteries produce waste and lose storage capacity over time; hydrogen tanks, on the other hand, are much better suited for storing large amounts of energy, while producing zero waste.


Hydrogen, stored in these tanks, can be converted back into electricity via a fuel cell system. Electricity, heat and water are produced when hydrogen bonds with oxygen in the air, all without creating any carbon dioxide emissions. The converted electricity can then be utilised as a power source for a wide range of applications, from stationary and industrial equipment to mobile appliances. Fuel cell systems are now a major part of the energy chain and they will only grow in importance over the coming years. Hydrogen is Earth’s smallest molecule; it permeates almost anything and is highly fl ammable when in contact with air. It is therefore crucial to prevent hydrogen tanks from leaking and to discover any such leaks as early as possible.


H2PULSE recently developed a high-precision, portable leak detection system for fuel cell systems. This system works on a simple principle; the fuel cell being tested is attached to the leak detection system via a standard plug-in connector. Hydrogen fuel cells have three channels: one for air/oxygen, one for hydrogen and a cooling channel.


Each channel is connected individually to the H2PULSE system.


When the fuel cell is not operational, a gas fl ow is connected to the fl uidic chain that feeds the three channels. The tests are performed independently of one another, fi rst using nitrogen, and then hydrogen, to detect any leaks in the system. The cooling channel’s sole purpose is to cool the fuel cells, which heat up during operation.


KELLER’s 33X and 21Y pressure sensors measure pressure at the fuel cell inlet and outlet. The measurements are recorded on a regular basis throughout the process and are displayed on-screen in real-time, to enable and ensure continuous monitoring. A reduction in pressure would indicate that there is a leak in one of the three fl ow channels. The high level of precision of KELLER’s pressure transmitters enables operators to detect leakages in the smallest non-leak-tight areas, thus ensuring that fuel cells remain safe to use.


New Lead-Free Galvanic Cell-type Oxygen Sensor KE-LF Series


Get ready to experience the latest and greatest from Figaro Engineering Inc. – the complete line of lead-free galvanic cell-type oxygen sensors KE-LF Series: KE-25LF, KE-25F3LF, KE- 12F3LF, KE-25F3LFM, and KE-50LF. These unique lead-free oxygen sensors feature long life expectancy, excellent chemical resistance, and no interference from CO2


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The KE-25LF and KE-25F3LF are the standard versions with a good balance between response time and life expectancy, which are ideal for oxygen monitoring in various industrial fi elds such as combustion gas monitoring, oxygen detectors, and more.


The KE-12F3LF is perfect for applications that require fast response, such as the food packaging industry. The KE-25F3LFM has an extended measurement range of up to 100%Vol oxygen, making it ideal for medical applications.


And the KE-50LF, with a 10-year life expectancy, is suitable for applications such as oxygen monitoring in food transportation.


With dimensions identical to the current leaded KE Series oxygen sensors, these new KE-LF series lead-free oxygen sensors ensure easy replacement of the current KE Series oxygen sensors.


Contact us to learn more about the sensor that best meets your needs. Applications examples: • Safety – Oxygen detectors • Environmental controls – Combustion gas monitoring • Food industry – Refrigeration, greenhouses • Educational material – Oxygen test kits • Medical fi eld – Oxygen monitors


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To this end, the plants will grow on the ISS and will be constantly monitored during this time with various sensors. Among other things, oxygen levels will be monitored with the TB200B-ES1-O2-25% gas sensor module from EC Sense.


The clover was chosen not only as a symbol of luck, but also because it belongs to the legume plant family, which also includes peas and lentils. These foods are rich in protein, which is necessary during long space missions, such as a mission to Mars, to provide astronauts with a source of nutrition.


EC Sense take great pride in supporting the scientists of the future on such an important forward-looking topic!


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Oxygen gas sensor sent into space


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Students from the Leibniz Unversity of Hannover were selected to send their experiment into space to the International Space Station ISS. The space shuttle was launched on March 15th, 2023 with the Glücksklee experiment and EC Sense’s oxygen sensor on board.


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The goal of the experiment is to study the symbiosis between clover plants and rhizobia bacteria in microgravity. The symbiosis between the plant and the bacterium leads to self-fertilisation. Gravity normally plays a major role in plant growth. Therefore, the team will test self-fertilization and growth under space conditions.


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