our amperometric Sensors

Simple Design

Rapidly measures both total residual oxidant (TRO) and salinity (for marine applications) and is installed directly in the ballast pipe, drinking water pipe, dropped into a water tank, or virtually any other application. Our simple design requires less maintenance, works in all types of water, and does not use reagents or membranes.

Cutting Edge Technology

The flexibility of Halogen’s Multi-parameter sensors allows for a wide variety of applications with minimal modifications. It is the only “flow-independent” sensor on the market. It is also the only sensor that carries the equivalent of an NSF61 certification for drinking water applications.

“Although we have already delivered over 2,000 sensors for BWMS, having a DNV GL type approval on our Amperometric TRO sensor for hazardous or non-hazardous locations is excellent news.  Additionally its performance has already been evaluated by the Alliance for Coastal Technologies.  They found our sensor to perform the same or better than the more costly and maintenance prone traditional DPD method.”

– President of Halgen Systems, Michael Silveri  

Quality Assurance Approvals & Testing

We have met and exceeded all expectations. See the results for yourself.

A Sensor that withstands seawater

Our reliable sensors are flow independent, self-cleaning, biofouling resistant, reagent free, and much more…


Ballast Water Treatment Systems (BWTS)

“We have done extensive testing of this unit and found it to be a robust marine grade field device. We like that the unit mounts right into the ballast water pipe. This avoids sample tubes, sample pumps, and reagents. Looking forward to seeing this on many marine vessels and ballast water treatment systems.

“BWMS designers should look closely at the Halogen TRO sensor. It has lower installation/maintenance costs, is easier to configure, and has far fewer parts. Its accuracy is the same level as the DPD method. To comply with the SDL (system design limitation) IMO requires measurement and recording the TRO, salinity and temperature. Halogen Systems TRO sensor measures it all."

“Veolia’s RWO unit received its IMO final approval for its ballast water treatment system using Halogen’s Amperometric TRO sensor. We are pleased with the sensors’ operation, reliability and performance.”

Wastewater Treatment

“I have not seen anything like this for my 30 years in the business.”

The City of Fort Myers Central Wastewater plant is happy with our choice of the Halogen Systems MP5™ chlorine analyzer. Our treatment plant regularly switches back-and-forth from processing surface water discharge to a 100% reclaimed water production process while emptying and refilling the chlorine contact basin in the process. The Halogen Systems MP5™ chlorine analyzer performs accurately without using reagents, membranes, straining, or pumps we needed with other analyzers. Maintenance of the probe continues to be minimal, even with the added strain to the sensor while switching between tank submersion and letting the sensor "dry" out for extended periods when beginning reclaim water production.

Municipal Water Treatment

“It can read were no other sensor was able to. The Halogen MP5 sensor gave us better insight into our processes.”

"We had some big rains and for the first time in many months and I am very pleased with the performance of the sensor. Additionally, since the semiannual clean and calibration of the chlorine analyzer, it continues to perform well. Thanks for the great product and support.”


Accurate In All Waters

Measures five parameters compensating for changes in salinity

Measures Chlorine (TRO), ORP, Conductivity, Temperature, pH

Highly integrated chlorine sensor costs dramatically less than traditional discrete sensors

No Membranes or Reagents

Bare electrodes eliminating the need for DPD Reagents.


Electrodes are self-cleaning

Flow Independent Measurement

It is the only flow independent amperometric sensor

Direct Pipe Installation for Fast Response

Installs directly in a ballast pipe reports TRO levels in as little as 50 seconds.