A floating pool monitor sits in the water and has to be taken out, charged and cleaned. An inline monitor is installed permanently in the circulation pipework and measures the water as it flows past. The difference shows up in daily handling, power and how representative the readings are.
How each type works
Floating monitors are battery-powered devices that drift on the surface, with sensors hanging in the water. They are easy to put in, but they measure the water around the device, sit among swimmers and need regular charging and cleaning.
Inline monitors are fitted into the circulation pipe, usually with a tee or saddle fitting. They measure the water that is pumped through the system, are powered from the mains and stay in place all year.
Side by side
| Inline | Floating | |
|---|---|---|
| Where it sits | In the pipework, out of sight | In the pool, among swimmers |
| Power | Mains supply | Rechargeable battery |
| Daily handling | None after installation | Remove, charge, clean |
| Pool covers and winter | Stays in place | Must be taken out |
| Installation | By a professional, once | By the owner |
Which one suits professionals?
For dealers, service companies, hotels and property managers, an inline monitor is usually the better fit: it is installed once, it does not depend on the owner remembering to charge it, and it can feed a professional dashboard that covers many installations. EVVO Sense is an inline monitor with a digital probe that measures pH, ORP and temperature.
Frequently asked questions
Is an inline pool monitor more accurate than a floating one?
It measures the circulating water rather than the water around one spot, and it is not moved around by swimmers or wind, which gives more consistent readings over time.
Does an inline monitor need batteries?
No. EVVO Sense, for example, is powered from the mains through a 5 V supply.
Can an inline monitor be fitted to an existing pool?
Yes. It is installed in the existing circulation pipework, typically in about 30 minutes.
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