H2S sensor for rough environments
Measure H2S anywhere
Get the right H2S insights with full time-resolution and no need for manual sampling.
Reliable insights in rough environments
SulfiLogger™ H2S sensor
The SulfiLogger™ sensor continuously measures H2S directly in wastewater, air, and inline in process gases. The sensor provides reliable insights that empower you to adopt a data-driven and proactive approach to odor and corrosion control in Wastewater, Biogas, and Oil & Gas industries.
With the SulfiLoggerTM H2S sensor you can:
Measure H2S almost anywhere in rough environments
Keep track of all changes in H2S levels
Avoid complex sample conditioning systems
SulfiLogger™ X1 series sensors:

Industries
H2S sensor solutions for any industrial application
Benefits
Data-driven and proactive odor and corrosion control
With the SulfiLoggerTM H2S sensor’s reliable insights, you can:
Map your network with a group of H2S loggers and implement a data-driven asset management strategy to extend the remaining lifespan of your valuable pipelines, wells, engines, and other assets.
Are you troubled by frequent odor problems?
Locate H2S hotspots in the network with the H2S monitor and prioritize mitigation initiatives to prevent rotten-egg malodors and time-consuming residential complaints handling.
Optimize existing chemical dosing strategies or adopt new semi- or fully automated dosing strategies using the SulfiLoggerTM probe’s real-time H2S data as a direct and dynamic control input for chemical dosing pumps.
Do you know the exact source of where your H2S problems originate?
Map hotspots in complex sewer networks to locate the root cause of H2S challenges and solve the problem at the source. The H2S device is suitable for both permanent and portable measurement campaigns.
Control and optimize your processes with real-time sensor data from the H2S logger.
H2S causes several negative health effects and is potentially lethal at concentrations above 500ppm. Detect peak loads in your H2S development and improve your worker safety.
Many traditional sensors and analyzers rely on complex gas conditioning systems to remove moisture and impurities before measurement.
The SulfiLogger™ sensor eliminates this need by measuring H₂S directly in raw gas streams. This simplifies installation, reduces maintenance, and provides reliable data without the hassle of additional equipment.

Insights
Read how reliable H2S data can transform your operations
Watch our “Smart odor & corrosion control” webinar series on demand.
Trusted
The SulfiLogger™ sensor is in operation in +30 countries world-wide
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"After struggling with H₂S meters that couldn't handle moisture, the City of Grand Rapids WRRF switched to SulfiLogger.
We now receive consistent, reliable readings, allowing us to monitor our digesters and H₂S removal media effectively. We’ve had great success with these sensors and recommend them to any facility dealing with high-moisture processes."
City of Grand Rapids, MI
Wastewater Operations & Maintenance Supervisor -
"We have 4 Sulfiloggers in operation across our wastewater system. Two are used to optimise iron(II) chloride dosing in pressure pipelines, while the other two are used to monitor H₂S levels and support testing of microorganisms in the sewer system.
Overall, the Sulfiloggers are an excellent operational tool. The data quality is outstanding, maintenance is extremely easy, and after more than a year of continuous operation, we have not noticed any significant wear."
Wolfburger Entwässerungsbetriebe
Thomas Rechlin, Head of Department for Treatment Plants and Pumping Stations -
"We are very satisfied with the sensor. The reliable measurement results are available to us in real time and help us to control our production efficiently and safely."
Thyssenkrupp Electrical Steel GmbH
Dr. Jan Mundry, Scientific Associate -
"We have successfully deployed SulfiLogger sensors across diverse applications, including drinking water reservoirs, irrigation wells, industrial and municipal wastewater systems, and landfill leachate.
The technology has proven consistently reliable, delivering accurate, real-time sulfide data that enhances system understanding and supports process optimization. The sensors’ robustness and durability under varied field conditions have been particularly impressive."
Nanoplus Limited
Raphi Mandelbaum, Managing Director -
"By installing SulfiLogger sensors in odor control systems in wastewater applications, we can continuously evaluate H₂S removal efficiency.
This has improved process transparency, optimised filter operation, and enhanced overall system reliability."
Dimtech S.A.
Theocharis Sideris, Environmental Engineer -
"The sensor is used in our laboratory to measure and test filter performance, helping us optimise the lifetime and effectiveness of our filters.
The SulfiLogger sensor has significantly simplified and improved our data collection when performing H₂S tests on filters."
Camfil AB
Laboratory Engineer








