About us

The SulfiLoggerTM sensor is developed and manufactured by SulfiLogger A/S in Denmark.

SulfiLogger A/S is a corporate spin-off of Unisense A/S.

Having developed various sensors for the measurement of dissolved gasses for the past 20 years, we have longstanding and thorough experience within the field of sensor construction, development, and application for research institutes, universities and the industry.

The first generation of H2S sensors were hand fabricated and custom-built for each user. Over the years we have developed several customized versions for the specific needs of each research group.

Based on a need from the industrial users to obtain more precise measurements of H2S levels in sewage systems, oil & gas facilities, and biogas production, we developed an H2S sensor for industrial purposes – the SulfiLoggerTM sensor. We leveraged the existing technology from the handmade sensors to a micro fabricated platform in order to improve the sensor performance and make it suitable for automated production.

Microsensors for scientific research
You can read more about Unisense and the company’s range of microsensors and equipment for microscale research at unisense.com.

Quality Management
SulfiLogger A/S is ISO 9001:2015 certified for the scope of manufacturing, sale, support, innovation and development of sensors and measurement systems for laboratory, industrial and field use.

Furthermore, we are ISO/IEC 80079-34:2018 certified for the manufacturing of intrinsically safe sensor solutions (Quality assurance notification for EU & Quality assurance notification for UK).

Payment information
Bank accounts

Contact us

    Wastewater applicationBiogas applicationOil & gas application


    Søren Porsgaard, Ph.D.
    Søren Porsgaard, Ph.D.CEO
    Kirsten Habicht, Ph.D.
    Kirsten Habicht, Ph.D.Sales Application Specialist
    Kim P. Karlson
    Kim P. KarlsonSales Engineer
    Anne-Sophie Martinsen
    Anne-Sophie MartinsenSales Engineer