Humidity Measurement inside HV Batteries
Filderstadt, September 2025 – CSM is expanding its HV DTemp measurement system with the option of integrating humidity sensors. Thanks to a single pass-through in the battery housing, just one HV-safe cable connects several hundred measurement points for temperature or humidity. In this way, the system combines humidity measurements with precise investigations of temperature profiles inside HV batteries.

During the development of HV batteries, testing is performed with a particular focus on safety and durability, which is why measurements inside the battery housing are necessary. Moisture measurements play a crucial role here, ensuring long-term safe operation. At the same time, the housing should be modified as little as possible to obtain meaningful results and to maintain its gas tightness. CSM is expanding its HV DTemp measurement system with suitable humidity sensors for these applications.

Flexible overall system for confined installation spaces in HV environments
The HV DTemp measurement system offers the option of applying up to 512 temperature or humidity sensors inside the battery, while only one HV-safe cable leads out of the test object. With no more than one pass-through required in the housing, this results in a wide range of applications for the system. The sensors are available customized and tailored to the measurement task in various arrangements. All components are compact in design, allowing them to be used even in confined spaces.

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Figure: Individual sensor for humidity measurement
Copyright: CSM GmbH

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Figure: Up to 512 sensors for temperature and humidity can be installed inside battery housings.
Copyright: CSM GmbH

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Figure: All sensors are connected to the central unit via a single, HV-safe cable.
Copyright: CSM GmbH

You can find this and other press releases on our websites at: www.csm.de/en/news/press

Press contact CSM: 
Annemarie Klepacki
Editor Corporate Communications & PR
Phone: +49-711/779 64-456
email: aklepacki@csm.de	

CSM Computer-Systeme-Messtechnik GmbH Raiffeisenstr. 36
70794 Filderstadt
www.csm.de	

All press contacts worldwide you will find at: www.csm.de/en/news/press

About CSM
With our innovative technology, we are making the mobility of today and tomorrow safer, more efficient and more sustainable. We, CSM Computer-Systeme-Messtechnik GmbH, are a manufacturer of distributed and robust measurement technology for vehicle development. 
We support many industries worldwide with our products in the successful transition to electrified systems. Offering a suitable measurement technology solution – supported by our expert team – is key to our success.
Our portfolio includes conventional and HV-safe measurement modules for the fast and synchronous acquisition of current and voltage, temperatures and many other measured values. We complement these with suitable software, data loggers and a large selection of memory card drives and storage media for industrial use. 
As part of the Vector Group and together with our partners, we offer comprehensive and complementary solutions for data acquisition and analysis from a single source.