Stagnant water
In stagnant water, algae and bacteria proliferate and deposits form on the bottom of the tank.
Systems
Fire-fighting water tanks
The water in fire-fighting tanks remains stagnant for long periods: without treatment it deteriorates, with the growth of algae and bacteria and the formation of deposits. Disinfection systems keep it in suitable condition, with the pH adjusted and the disinfectant at the set value.
- Free chlorine or Redox
- pH
- Integrated or dedicated pumps
Requirements
The requirements
Disinfectant and pH
Chlorine keeps the water disinfected; pH affects its effectiveness.
Continuous measurement
The measurement of free chlorine or Redox controls dosing only when it is needed.
Typical layout
Typical layout
5 systems
The systems
Each system has its own page with the diagram, the components and the operation.
WDpHCl
The WDpHCl controller measures pH and free chlorine and controls two integrated dosing pumps, one for the acid and one for the hypochlorite: a compact solution for keeping the water in the fire-fighting tank disinfected.
Advantages
- Controller and two integrated pumps in a single unit: a compact solution.
- Free chlorine measured in mg/l and pH adjusted.
Limitations
- Flow rates limited to those of the integrated pumps: for larger tanks the LD controller with dedicated pumps is preferable.
WDpHRh
The WDpHRh controller measures pH and Redox potential with the electrodes immersed in the tank and controls two integrated dosing pumps for the acid and the hypochlorite: the most economical solution for fire-fighting water tanks.
Advantages
- The most economical solution, with the two integrated pumps.
- The electrodes can be installed directly in the tank.
Limitations
- Indirect measurement: it reads mV, not mg/l of free chlorine.
- The reading depends on pH and conductivity and must be checked periodically with the chlorine test.
LDpHCl
For larger tanks: the two-channel controller measures pH and free chlorine and controls dedicated dosing pumps, selected according to the volume of the tank.
Advantages
- Dedicated dosing pumps, selected according to the volume of the tank.
- pH and free chlorine measured in mg/l.
LDsCL
The LDsCL controller continuously measures the free chlorine in the tank water with an amperometric cell and controls the hypochlorite pump, maintaining the residual at the set point.
Advantages
- Free chlorine measured continuously in mg/l with the amperometric cell.
- Residual maintained at the set point.
Limitations
- pH is not adjusted: it must be checked periodically.
LDsRh
The LDsRh controller measures the Redox potential of the tank water and doses hypochlorite up to the set point: a simple and economical solution.
Advantages
- Simple and economical solution.
Limitations
- Indirect measurement: it reads mV, not mg/l of free chlorine.
- pH is not adjusted; the reading depends on pH and conductivity.
Remote control
System remote control
The controllers can be remotely controlled bidirectionally (read and write) from the web portal, from PC, tablet and smartphone: viewing of measurements, modification of set points, dosing and alarms, receipt of alarms and download of logs. Alternatively, integration into your PLC via Modbus is possible.
Ethernet
Connection to the web portal via network cable: measurements, set points, dosing and alarms accessible from PC, tablet and smartphone.
Wi-Fi
Wireless connection to the web portal, with the same functions as the cable connection.
4G
Connection via the cellular network for installations without a local network, with alarm notification by SMS or e-mail.
Modbus RTU
Integration into your PLC via serial port.
Modbus TCP/IP
Integration into your PLC or SCADA via Ethernet network.
0-4/20 mA output
Current signal proportional to the measured value, for remote monitoring or for controlling pumps and other instrumentation.
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.
Insights
Insights
Well water
Insight →
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 advice
Describe your plant and the flow rate of water to be treated: we will propose the most suitable system.