1
Filtration
The water is drawn in through the skimmer and sent by the filtration pump to the filter, which retains the suspended impurities.
Swimming pool systems
WNpHRh
Peristaltic version of the WDpHRh: two stepper-motor peristaltic pumps, quiet and precise, measure and control pH and Redox potential. Wi-Fi as standard and automatic dosing based on the pool volume; sample filter and probe holder are pre-assembled on a panel.
- Stepper-motor peristaltic pumps
- Quiet operation
- pH and Redox
- Wi-Fi as standard
- AUTO DOSING from the pool volume
2Peristaltic pumps
12l/hMaximum flow rate
1–100%Adjustable speed
700mVExample set point
How it works
The treatment circuit of a swimming pool
The pool water circulates continuously between the pool and the plant room, where it is filtered, analysed and disinfected before being returned.
Insight: swimming pool water →
2
Measurement
A water sample flows through the probe holder of the panel, where pH and the Redox potential are measured continuously.
3
pH control
The controller regulates pH as a priority: the pump doses the corrector until the set value is reached.
4
Chlorine dosing
With the pH at the correct values, hypochlorite is dosed, at a flow rate that is progressively reduced as the set point is approached.
5
Return to the pool
The filtered and disinfected water is returned to the pool through the return inlets.
6
Make-up
Water lost through evaporation or discharge is replaced; with the Centurio POOL the volume fed in is measured by a pulse-output water meter.
Typical layout
Typical layout
The treatment system is installed in the plant room, downstream of the filtration: the probes analyse a water sample and injection takes place on the delivery pipe to the pool.
Components
Basic components
The system is supplied pre-assembled on a plastic panel, ready for connection to the pool delivery pipe.
Controller with two peristaltic pumps
Two stepper motors with long-life, low-permeability peristaltic tubes, one for the pH corrector and one for the hypochlorite; hydraulic parts in PVDF, colour status display.
WNpHRh pump →
pH electrode
EPHS combination electrode with BNC connector, 0 – 14 pH range, temperature-compensable.
pH electrodes →
Redox electrode
Single-junction combination electrode, 0 – 1,000 mV range, 1 mV resolution; the reading must be checked periodically with the colorimetric chlorine test.
Redox electrodes →
Filter and probe holder
Connected in series on the panel: the water sample is filtered and flows through the probe holder, which houses the pH and Redox electrodes.
Probe holders →Four modes
ON/OFF, proportional, timer and AUTO DOSING, which optimises dosing on the basis of the pool volume and the pipe diameter.
pH priority
The controller corrects the pH first and only then doses the disinfectant; the start of dosing can be delayed by up to 60 minutes.
Variable speed
The speed of each motor varies in real time from 1 to 100%, for continuous and precise dosing.
Alarms
Maximum dosing, probe failure, chemical levels, mains voltage and no flow.
Flow rates
Flow rates and supplied equipment
Flow rates
- From 0.018 to 1.8 l/h with 1.6 × 1.6 mm tube
- From 0.12 to 12 l/h with 4.8 × 1.6 mm tube
Installation kit
- PVC suction tube, 2 m
- PVC vent tube, 2 m
- PE delivery tube, 2 m
- 0.3 bar injection valves
- Foot filters with level probe
Colour display
Colour-coded status indication
The display colour changes according to the operating status, so that an alarm can be recognised even from a distance.
Green
Normal operation according to the set parameters, no active alarms.
Yellow
Non-blocking alarm, for example waiting for an external signal.
Red
Blocking alarm, for example the chemical in the tank running out.
White
Pump stopped by an external control signal (stand-by).
Settings from the display
Technical data
Probe data sheet
pH electrodes
| Electrode | Pressure | Connection | Body | Minimum conductivity | Junction | Temperature | Cable | Diameter | Notes |
|---|---|---|---|---|---|---|---|---|---|
| EPHS | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | – | 70 °C (80 °C) | 0.8 m | 12 mm | – |
| EPHM | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | – | 70 °C (80 °C) | 4.5 m | 12 mm | – |
| EPHL | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | – | 70 °C (80 °C) | 15 m | 12 mm | – |
| EPHSN6 | 7 bar (3.5 bar) | SN6 with PG13.5 thread | Epoxy | 100 µS | – | 70 °C (80 °C) | 1 – 100 m | 12 mm | – |
| EPHMD/100 | 7 bar | BNC | Epoxy | 100 µS | Double | 100 °C | 4.5 m | 12 mm | – |
| EPHM/D | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | Double | 70 °C (80 °C) | 4.5 m | 12 mm | – |
| EPHM/D/SN6 | 7 bar (3.5 bar) | SN6 with PG13.5 thread | Epoxy | 100 µS | Double | 70 °C (80 °C) | 1 – 100 m | 12 mm | – |
| EPHMD/LI | 7 bar (3.5 bar) | SN6 with PG13.5 thread | Epoxy | 3 µS | Double | 70 °C (80 °C) | 1 – 100 m | 12 mm | For low-conductivity water |
| EPHSC | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | Double | 70 °C (80 °C) | 4.5 m | 12 mm | Self-cleaning |
| EPHSC/SN6 | 7 bar (3.5 bar) | SN6 with PG13.5 thread | Epoxy | 100 µS | Double | 70 °C (80 °C) | 1 – 100 m | 12 mm | Self-cleaning |
| EPHM/HF | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | Double | 70 °C (80 °C) | 4.5 m | 12 mm | Resistant to 1% hydrofluoric acid |
| EPHSN6 GK | 10 bar | SN6 | Glass | 150 µS | – | −5 / 135 °C | 1 – 100 m | 12 mm | High temperature |
All models: combination electrode, range 0 – 14 pH, resolution 0.01.
Redox electrodes
| Electrode | Range | Pressure | Connection | Body | Minimum conductivity | Junction | Temperature | Cable | Diameter | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| ERhS | ± 1,000 mV | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | – | 70 °C (80 °C) | 0.8 m | 12 mm | – |
| ERhM | ± 1,000 mV | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | – | 70 °C (80 °C) | 4.5 m | 12 mm | – |
| ERhL | ± 1,000 mV | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | – | 70 °C (80 °C) | 15 m | 12 mm | – |
| ERhHLB SN6 | ± 1,500 mV | 6 bar | SN6 with PG13.5 thread | Glass | 100 µS | – | 80 °C | 10 m | 12 mm | High linearity and sensitivity, for low chlorine concentrations |
| ERhSN6 | ± 1,000 mV | 7 bar | SN6 with PG13.5 thread | Epoxy | 100 µS | – | 100 °C | 1 – 100 m | 12 mm | – |
| ERhMD/100 | ± 1,000 mV | 7 bar | BNC | Epoxy | 100 µS | Double | 100 °C | 4.5 m | 12 mm | – |
| ERhM/D | ± 1,000 mV | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | Double | 70 °C (80 °C) | 4.5 m | 12 mm | – |
| ERhSC | ± 1,000 mV | 7 bar (3.5 bar) | BNC | Epoxy | 100 µS | Double | 70 °C (80 °C) | 4.5 m | 12 mm | Self-cleaning |
| ERhSC/SN6 | ± 1,000 mV | 7 bar (3.5 bar) | SN6 with PG13.5 thread | Epoxy | 100 µS | Double | 70 °C (80 °C) | 1 – 100 m | 12 mm | Self-cleaning |
All models: combination electrode, resolution 1 mV.
Remote control
Remote control
Wi-Fi is standard: from the web portal, free of charge and with no subscription, you can read the measurements, change set points and dosing and receive alarm notifications, from PC, tablet and smartphone.
Wi-Fi
Wireless connection to the web portal, with the same functions as the cable connection.
The NIMBUS portal
A single account brings together all registered installations, each with its own devices: the web portal, free of charge and with no subscription, can be accessed from PC, Mac, tablet and smartphone and allows every parameter to be both viewed and changed, with an encrypted connection and protected access.
Overview
On a single screen: probe readings, chemical levels, pump activation thresholds and active alarms, with the status of installations and devices (normal, warning, alarm, standby, not connected).
Installation map
Installations appear on an interactive map with their status and open with a click; for each one, the local weather conditions and temperature are also shown.
History and charts
Archive of measurements and alarms, available for consultation at any time with charts and numerical reports exportable in Excel format.
Alarms and notifications
Alarm thresholds for readings, dosing, faulty probe and out-of-range readings, with notification by e-mail or SMS depending on the communication system; a warning is also issued when an installation remains disconnected beyond the set time.
Set points and dosing
Remote modification of the set points, of the dosing pump activation thresholds and of the corresponding hourly flow rate.
Inputs and outputs
Status of relays, pulse outputs, digital inputs and current outputs, with the name assigned to each connection.
Maintenance calendar
Tasks are scheduled by installation or by device and assigned to technicians; a reminder is sent by e-mail two days before the due date. Each task is shown as scheduled, due, overdue or completed.
Team and permissions
The main account has full access and creates the technicians’ accounts, each enabled only for the assigned installations and devices; the last login and activity of each technician are visible.
Reports and activity log
Reports on devices, tasks and technicians, downloadable in PDF or CSV with the customer’s logo; the log keeps the history of operations and disconnections.
Customisation
Logo, main colour and light or dark theme; the tiles on the main screen can be rearranged by dragging them. Two installations can be displayed side by side for comparison.
Guided registration
Each device is added through a guided procedure: the model is recognised automatically and associated with the installation, together with the technician to be contacted.
PLC integration
As an alternative to the portal, the Modbus RTU or TCP/IP port allows integration into the plant supervision system.
Applications
Where it is used
For private swimming pools.
Private swimming pools
Residential pools, where free chlorine, Redox, hydrogen peroxide and salt are all options.
Private swimming pools →
Installation
Installation
Pre-assembled
All systems are supplied pre-assembled on a plastic panel, in a watertight box or on a skid, with solenoid or peristaltic dosing pumps.
In the plant room
Injection takes place on the delivery line, downstream of the filtration, by means of an injection valve or lance; the probes analyse a water sample in the flow-through probe holder.
Probe holders →Connection to the filtration
The controller must always remain powered, to maintain the polarisation of the electrodes; when the filtration pump stops it goes into stand-by, continuing to measure without dosing.
Installations
Installation examples
Systems are supplied pre-assembled and tested, in the form best suited to the plant room: on a panel, in a cabinet or on a skid (with cover, in a box or on a frame), also tailor-made. Some examples.
On a panel
Controller, pumps, probe holder and accessories mounted and wired on a wall panel.
In a cabinet
System panel and chemical tanks housed in a single cabinet.
Wall cabinet
Pipework, pumps and electrical panel in a wall cabinet with door.
Skid with cover
Skid with raised stainless steel frame and protective PMMA cover.
Skid in a box
Skid enclosed in a box with door, with the chemical tanks at the base.
Skid on a frame
Skid on a frame with doors, pre-assembled and ready for connection.
On the tank
Dosing pump mounted directly on the tank: the most compact solution.
In the plant room
Wall installation in the plant room, with the chemical tanks on the floor.
Pumps, controllers or components supplied by the customer can also be fitted, with custom dimensions, back panel and electrical panel. Dosing stations and skids →
Which one to choose
From the simplest to the most complete solution
For chlorine and other disinfectants the basic solution is the dosing station; to dose according to the concentration actually present in the water, measuring controllers are used.
Dosing station
The simplest solution: the pump doses at a constant rate or in proportion to the volume of water measured by the pulse-output water meter.
Details →
LDsRh
Dosing based on the Redox potential of the water: an economical solution, based on an indirect measurement.
Details →
LDsCL
The amperometric cell directly measures the disinfectant concentration in mg/l, ensuring maximum dosing accuracy.
Details →
LD Dual Parameter
Simultaneous management of two parameters, for example pH and chlorine, with a single controller.
Details → Centurio PRO
Management of up to 10 parameters and of all the pumps in the installation, with touch screen and remote control as standard.
Details →Technical consultancy
Tell us the pool volume, the disinfectant used and the characteristics of the plant room: we will propose the most suitable version and accessories.