Accuracy & Reliability
The MP-5F is specified at ±5% accuracy and holds it for months without calibration, cleaning, or reagent replacement. The original MP5 was specified at ±15%; the MP5-A brought that to ±5%, and the MP-5F keeps ±5% with no monochloramine interference for free chlorine.
The MP-5F is specified at ±5%. The original MP5 was specified at ±15%; the MP5-A brought that to ±5%, and the MP-5F keeps ±5% with no monochloramine interference for free chlorine.
Sensors operate for six months or more between calibrations — verified across dozens of utility deployments.
Measured at City of Lakewood, CA during a 6-month parallel test against standard DPD reference methods.
White paper documents continuous accuracy over 65 days with no drift, no cleaning, and no recalibration.
Why Accuracy Matters
Inaccurate chlorine readings create cascading problems: over-chlorination wastes chemical, under-chlorination risks public health, and false alarms trigger costly field responses. Halogen sensors maintain their accuracy because three patented technologies work together — bare-electrode amperometry for a clean signal, the HiRes™ impeller for flow independence, and SensiCLENE™ self-cleaning to prevent electrode fouling.
How Halogen Compares
| Halogen MP Sensor | Reagent-Based (DPD) | Membrane Amperometric | |
|---|---|---|---|
| Calibration Frequency | Every 6 months (typical) | Weekly to monthly | Monthly (flow-dependent) |
| Reagent Consumption | None | ~$500–1,500/year | Electrolyte replacement |
| Waste Stream | Zero discharge | 50,000–70,000 gal/year | Minimal |
| Flow Dependence | Flow-independent (HiRes™ impeller) | Requires regulated flow | Flow-sensitive |
| Typical Accuracy | MP-5F: ±5% (specification) | ±5–10% (when freshly calibrated) | ±10–15% |
| Maintenance Per Visit | ~15 min (annual wear parts) | 30–60 min (reagents + tubing) | 30+ min (membrane + electrolyte) |
| Bio-Fouling Prevention | SensiCLENE™ continuous self-cleaning | Manual cleaning required | Manual cleaning required |
Proven at Utilities Nationwide
Orange County, FL
Original MP5 field result: ±5% accuracy across five sensors over 6+ months — three different treatment chemistries.
Iron Bridge WRF, Orlando
Matched all discrete sensor readings (pH, ORP, conductivity, temp) during 3-month trial. EPA 334 data submitted.
City of Lakewood, CA
0.04–0.05 ppm deviation from DPD over 6-month pilot. Zero calibration required.
Palm Beach County, FL
Only 3 calibrations in 2 years of continuous operation.
County of Maui, HI
Zero calibration since installation at remote low-pressure groundwater site.
See the accuracy for yourself.
Request a pilot sensor for your site — no commitment, no upfront cost.