Halogen Sensor FAQ

The MP-5F™ features a patented self-cleaning technology called SensiCLENE™, which uses an impeller to cycle special polymer beads over the sensor electrodes and pH probe. This continuous cleaning prevents buildup and fouling, reducing the need for frequent manual intervention. Unlike traditional sensors, it requires no membranes or reagents to replace, and its stable calibration can last for months — sometimes up to a year — minimizing upkeep.

Cleaning beads are a routine consumable. Inspect the impeller, pH electrode and other A-kit parts and replace according to condition and the model manual. These components can last substantially longer than a year; extreme water conditions can shorten pH electrode life. Keep reference checks and calibration verification in the service plan.

5 years, then the sensor is rebuilt. The self-cleaning system significantly extends electrode life compared to conventional amperometric sensors that require frequent manual cleaning.

1 year.

Yes. The MP-5F is the current generation of the Halogen MP5 free-chlorine sensor. The original MP5 was specified at ±15% accuracy; the MP5-A improved that to ±5%; the MP-5F keeps ±5% and has no monochloramine interference for free chlorine.

The MP-5F™ is designed with flexible installation options due to its small footprint, flow independence, and durability. It can be inserted directly into a pipe (wet-tap), installed in a PVC tee, submerged in a tank, or used in a flow cell. Its NSF-61 certification allows it to be placed in drinking water systems without a waste stream, and it withstands pressures up to 10 bar (150 psi) and a wide range of conditions, making it adaptable to various environments.

The MP-5F™ offers a wet-tap (hot-tap) installation option, allowing it to be inserted directly into an active pipeline without interrupting flow. A retractable remover kit (H2WT-P) facilitates this process, enabling maintenance or removal without shutting down the system. This is supported by its NSF-61 certification and robust design, which handles pressures up to 150 psi.

Yes. All of the wetted components are NSF-61 certified. The side stream flow can be returned directly to the process without concern for contamination.

Bubbles are the main interference. Areas with cavitation or turbulence should be avoided. The sensor handles pressures from −0.7 to 10 bar (vacuum to 145 psi) and flow from zero to 4 m/s across a wide range of installation configurations.

No, the MP-5F™ is unaffected by flow or pressure variations. It has an integrated pump that maintains a consistent flow across the electrodes, ensuring accurate readings regardless of external conditions — ranging from zero flow to 4 m/s and pressures from 0 to 10 bar. This flow independence eliminates the need for complex flow-control plumbing.

Yes, the MP-5F™ operates effectively even in zero-flow conditions. Its built-in pump generates its own flow across the electrodes, ensuring reliable measurements without relying on external water movement. This makes it ideal for static environments like tanks or pipes with intermittent flow.

The MP-5F™ doesn't suffer from a "memory effect" after prolonged absence of chlorine. Its pH cartridge is designed to rapidly rewet and restore accuracy within 3 minutes of reimmersion, even if it dries out. The sensor stabilizes within 5 minutes of installation or re-exposure, and its calibration remains intact, unaffected by dry periods or lack of chlorine.

The MP-5F™ uses advanced amperometric technology with a three-electrode system, enhanced by onboard pH and temperature compensation. The MP-TOTAL variant, built on the MP5™ platform, is specifically designed for measuring both monochloramine and free chlorine alongside other parameters like pH, conductivity, and ORP. This multiparameter capability is achieved through precise electrochemical detection tailored to distinguish these chlorine species.

The MP-TOTAL can measure free chlorine and monochloramine as distinct parameters, while total chlorine includes both free and combined chlorine (like monochloramine). The sensor's ability to differentiate free chlorine and monochloramine provides more specific data. It also provides a total chlorine measurement in addition to free chlorine and monochloramine levels.

Yes. Halogen sensors are BABA compliant. They are also manufactured in the United States.

Yes, and they are BABA compliant. Halogen Systems is based in Reno, Nevada.

Yes. All Halogen sensors, cables, flow cells, and components are certified compliant with NSF-61/372.

Yes, for qualified buyers. Contact us to discuss a trial deployment at your facility.