Hydrogen's potential as a fuel source is unparalleled: Its combustion releases intense heat with no CO2 emissions. Additionally, hydrogen is used in fuel cells generating electricity through a clean chemical reaction emitting only water vapor as a by-product. This makes hydrogen a game-changer for clean and sustainable energy solutions, especially if produced with electricity from renewables (green hydrogen). However, the requirements for the measurement devices to be used are challenging.
The hydrogen ecosystem

Green hydrogen via electrolysis: ensuring water quality
One of the most critical steps for electrolysis is the water preparation to a particular quality specification, which varies for different types of electrolyzer technology. It is essential to measure the following parameters: level, flow, pressure, conductivity, and in some cases pH. As green hydrogen facilities scale up, TOC may be another parameter to quickly detect failures in upstream treatment that would not be caught by conductivity or pH.
Our expertise in the field
Along the different treatment steps, water quality monitoring is crucial to ensure reliability and process efficiency. Discover our broad range of sensors and analyzers to safely monitor these processes.
- Electromagnetic flow meter

Highest safety and expert know-how
Given measurement’s critical role in process safety, Endress+Hauser has joined the Center for Hydrogen Safety (CHS) to offer its voice to advance the promotion of hydrogen safety and help CHS ensure safety information, guidance and expertise is available to all stakeholders.
Our expertise in the field
Whether the concerns are around hazardous area protection concepts, SIL ratings or proof testing concepts for Safety Instrumented Systems (SIS), or specific application risk (such as hydrogen permeation), our industry experts are there with you to work through these critical details.
- Reliable and accurate instrumentation for gas separators in electrolysis process for green hydrogen production
- Ensuring highest product quality and reliability following SIL and cyber security guidelines to reduce risk and downtime
- Improved maintenance, lifecycle and asset management: Our IIoT solution platform Netilion helps you to keep track of your installed base, documentation and data management by providing insights about the instruments’ performance and health status
Our offering
Our offering comprises highly reliable measurement devices, services and solutions for hydrogen-based or -enhanced power generation: best-in-class flow meters to reduce cost, maintain compliance and extend turbine life by reducing the risk of flashback, liquid analysis to ensure water quality, gold-plated pressure transmitters for enhanced safety, temperature sensors for optimal operation, purity measurement to ensure fuel cell efficiency, and Raman spectroscopy for gas composition analysis.
- Proven in use technology and solutions for hydrogen ensuring safety and reliability
- We support our customers on their journey through digital transformation as key enabler for decentralized energy supply and energy transition
- Broad portfolio: best-fit measurement equipment from one single supplier
- Unparalleled in accurate and reliable quantity, quality, and gas composition measurement
- Increase system performance while reducing operation costs: Endress+Hauser Heartbeat Technology is a proven comprehensive diagnostic, verification and monitoring concept