Halogen MP5 vs. Hach CLF10sc
Quick Answer
How does the Halogen MP5 compare to the Hach CLF10sc?
Side-by-side comparison
| Feature | Halogen MP5 | Hach CLF10sc |
|---|---|---|
| Measurement method | Bare-electrode amperometric | Membrane amperometric |
| Reagents | None | None (reagent-free) |
| Membrane & electrolyte | None — SensiCLENE™ self-cleaning | Membrane cap + electrolyte (periodic replacement) |
| pH compensation | Built-in — measures pH directly | Requires a separate pH sensor (~10% error per pH unit) |
| Flow requirement | Independent — reads at zero flow | Regulated flow required (flow cell/panel) |
| Parameters | 5 (free Cl₂, pH, conductivity, temp, ORP) | 1 (free Cl₂) + add-on pH |
| NSF/ANSI 61 in-pipe | Yes (wet-tap in a main) | No — side-stream panel |
| Calibration / service | 6–12 months | Weekly–monthly; periodic membrane/electrolyte service |
| Est. annual operating cost | as low as ~$185 | Membrane/electrolyte + separate pH sensor upkeep |
Competitor specifications per Hach published CLF10sc documentation; comparison for general guidance.
The real difference: maintenance design
The CLF10sc and MP5 are often shortlisted together because both avoid DPD reagents. The decision usually comes down to what each one needs to keep running accurately. The CLF10sc’s measurement depends on a gas-permeable membrane and an electrolyte that drift and require periodic replacement, and because its reading shifts roughly 10% per pH unit it must be paired with a separate pH sensor. It also needs a regulated flow cell, which means a side-stream panel rather than in-pipe installation.
The MP5 removes all three of those dependencies. There is no membrane or electrolyte — the SensiCLENE bead system mechanically cleans the bare electrode continuously. pH is measured directly in the same probe, so chlorine readings are compensated without a second instrument. And the HiRes impeller makes the measurement flow-independent, enabling direct NSF/ANSI 61 in-pipe installation, even at dead ends.
Frequently asked questions
Is the Hach CLF10sc reagent-free like the MP5?
Both are amperometric and use no DPD reagents. The difference is maintenance design: the CLF10sc relies on a membrane cap and electrolyte that must be replaced periodically and a separate pH sensor for compensation, and it requires regulated flow through a panel. The MP5 has no membrane (SensiCLENE self-cleaning), measures pH directly in the same probe, and is flow-independent.
Does the MP5 need a separate pH sensor like the CLF10sc?
No. CLF10sc free-chlorine accuracy depends on pH, so it pairs with a separate pHD/combination pH sensor that itself needs calibration and upkeep. The MP5 measures pH directly as one of its five parameters, with no second instrument to maintain.
Does the MP5 require regulated flow like the CLF10sc?
No. The CLF10sc requires a regulated sample flow through a flow cell. The MP5’s patented HiRes impeller maintains constant flow across the electrode regardless of pipeline flow, so it reads accurately even in dead ends and at zero flow — and installs directly in-pipe (NSF/ANSI 61) rather than on a side-stream panel.
What about membrane and electrolyte maintenance?
The CLF10sc membrane and electrolyte degrade and need periodic replacement, a recurring service task. The MP5 has no membrane at all — the SensiCLENE bead system continuously cleans the bare electrode — so routine upkeep is annual cleaning beads ($35/yr) and a pH sensor ($295 every 1–2 years).
Compare the MP5 head-to-head
Talk through a CLF10sc replacement or request a side-by-side pilot.