The TCD3000 SiA H2 gas analyser
The screw-in analyser with microsensor technology enables precise and fast analysis of binary gas mixtures (e.g. H2 in O2) by means of thermal conductivity measurement. With a response time of < 30 ms, a measuring range from a few ppm to 100 vol.% and a functional capability up to 200 bar as well as under humid conditions, it is consistently orientated towards the requirements of the hydrogen industry. Thanks to its long service life, low maintenance, high compatibility and minimal dimensions, it also offers cost, labour and space savings.
The TCD3000 SiA H2 gas analyser
The screw-in analyser with microsensor technology enables precise and fast analysis of binary gas mixtures (e.g. H2 in O2) by means of thermal conductivity measurement. With a response time of < 30 ms, a measuring range from a few ppm to 100 vol.% and a functional capability up to 200 bar as well as under humid conditions, it is consistently orientated towards the requirements of the hydrogen industry. Thanks to its long service life, low maintenance, high compatibility and minimal dimensions, it also offers cost, labour and space savings.

Fast: less than 30 ms response time
Precise: high accuracy in a wide measuring range
Durable: moisture-resistant measurement
Practical: can be screwed directly into the process
Areas of application
Archigas’ advanced thermal conductivity meters offer precise solutions for safety and process applications. They measure hydrogen in electrolysis and fuel cell systems, monitor hydrogen concentrations in natural gas and are ideal for helium and hydrogen leak detection. The devices are predestined for monitoring and reducing emissions in decarbonisation projects and promote the highest product quality in various industries.
Areas of application
Archigas’ advanced thermal conductivity meters offer precise solutions for safety and process applications. They measure hydrogen in electrolysis and fuel cell systems, monitor hydrogen concentrations in natural gas and are ideal for helium and hydrogen leak detection. The devices are predestined for monitoring and reducing emissions in decarbonisation projects and promote the highest product quality in various industries.

Electrolysis
Monitoring of UEL / LEL and purity, e.g. for H2 electrolysis

Fuel cell
Monitoring the hydrogen concentration in the exhaust gas train

H2 in natural gas
Determination of the hydrogen content in natural gas networks up to 100%

Helium measurement
Fast and precise helium detection without detours

Leak testing
Automated detection of leaks for monitoring

Further areas of application
Purity control, purge gas monitoring, measurement of other binary or quasi-binary gas mixtures
References & awards
Archigas GmbH has qualified for several state funding projects, was on the podium of the ‘Hessen Champions’ in the ‘Innovation’ category in 2023 and received the highly coveted ‘Hermes Startup Award’ from the hands of Federal Research Minister Bettina Stark-Watzinger in the presence of Federal Chancellor Olaf Scholz and EU Commission President Ursula von der Leyen at the Hannover Messe in 2024.

References & awards

Archigas GmbH has qualified for several state funding projects, was on the podium of the ‘Hessen Champions’ in the ‘Innovation’ category in 2023 and received the highly coveted ‘Hermes Startup Award’ from the hands of Federal Research Minister Bettina Stark-Watzinger in the presence of Federal Chancellor Olaf Scholz and EU Commission President Ursula von der Leyen at the Hannover Messe in 2024.
What customers are saying
„We use the TCD3000 SiA in an AEM electrolysis test bench. The sensor is characterized by a very stable measurement signal and low drift with simple and uncomplicated calibration. Even the smallest quantities of gas are sufficient to obtain plausible values.
By using the sensor in the oxygen line of our electrolysis systems, we can quickly and reliably detect hydrogen crossover across the membrane and potential membrane and seal damage very accurately.
The sensor itself can be implemented and put into operation easily and without great effort. A practical feature is that it can also be installed in confined spaces due to its compact size. We will be equipping further systems with the device.“
DI Stefan Kolar
H2i GreenHydrogen GmbH
“We use the Archigas TCD3000 in electrolysis to determine the hydrogen crossover on the oxygen side and the purity on the hydrogen side. The sensors work precisely and react very quickly to changes in gas quality. They also cope very well with any moisture or residual caustic.
Another great advantage is that the gas quality can be reliably determined throughout operation without major changes to the system.
Implementation and handling are easy: the sensors are installed in the gas path and can simply be read out via a current signal.”
Erik Delp
Frankfurt University of Applied Sciences
“We monitor, measure and control the atmosphere in our electrode boilers. This is because the boilers heat the water with electrodes and separate the water into various gases.
We require to control the atmosphere in the electrode boliers and have chosen to use technology from Archigas.
Alongside, that we have good experience with this technology, we also experience professional dialogue with Archigas staff.”
Morten Hildebrandt Jensen
Fjernvarme Fyn
“We use the TCD3000 Si from Archigas to determine the gas composition of the product gas in a test setup for zinc interstage electrolysis.
The device is able to detect from 0-100% hydrogen content with high accuracy, which is absolutely essential for the application. We obtain a stable signal without any significant noise or drift. And even with high humidity and even condensing conditions in the sample gas, the sensor delivers a reproducible signal.
Thanks to clear documentation and a well thought-out communication protocol, installation and commissioning are easy. Communication between the PC and sensor is stable.
We would also like to use the device for a later application with high pressure. If we have any questions or queries for Archigas, they respond quickly and helpfully.”
Technische Universität Berlin
Chair of Powertrain Technologies
What our clients say
Our company
Archigas GmbH, based in Rüsselsheim/Germany, is a leading supplier of innovative gas analysers based on thermal conductivity detectors (TCD Thermal Conductivity Detector). The state-of-the-art devices have been specially developed for the measurement of binary and quasi-binary gas mixtures and are used in various industrial sectors, including fuel cell and electrolysis technology. Expertise and experience in the development of MEMS sensors and gas analysers enable Archigas GmbH to meet the specific requirements of its customers from all over the world and to offer them optimal solutions ‘Made in Germany’. The company, with its team of specialists from various disciplines, stands for customised advice and practice-
oriented customer service. The Swiss company SERTO AG has been a minority shareholder since 2024.
Our company
Archigas GmbH, based in Rüsselsheim/Germany, is a leading supplier of innovative gas analysers based on thermal conductivity detectors (TCD Thermal Conductivity Detector). The state-of-the-art devices have been specially developed for the measurement of binary and quasi-binary gas mixtures and are used in various industrial sectors, including fuel cell and electrolysis technology. Expertise and experience in the development of MEMS sensors and gas analysers enable Archigas GmbH to meet the specific requirements of its customers from all over the world and to offer them optimal solutions ‘Made in Germany’. The company, with its team of specialists from various disciplines, stands for customised advice and practice-oriented customer service. The Swiss company SERTO AG has been a minority shareholder since 2024.
Archigas in the headlines – current press articles

PA& Reshape, 22.04.2025
„Wasserstoff in Erdgas“ Sensorlösung von Archigas detektiert H2 in CH4 schnell und zuverlässig

Tube Düsseldorf, 17.04.2025
Archigas sensor solution detects hydrogen in natural gas

S&S Insider, März 2025
Hydrogen Detection Market Size & Growth Trends

Rüsselsheim am Main, 11.02.2025
Hat Rüsselsheim am Main das Zeug zum Wasserstoffstandort?

POMP NL, 29.01.2025
Archigas presenteert gasanalyser in ATEX inschroefversie

Fuel Cell China, 21.01.2025
The upcoming “Hyvolution 2025” is a very special event for Archigas for their hydrogen gas analyzer

Process, 09.01.2025
Sensortechnologie – Wasserstoff aufspüren und erfassen

prozesstechnik online, 11.11.2024
H2-Gasanalysator in Atex-Einschraubervariante