Measurement
The probe detects conductivity, on a µS or mS range depending on the model, with automatic temperature compensation.
Measurement and control
LDsCD
The LDsCD system measures the conductivity of the water and, according to the set value (set point), activates or deactivates the dosing of chemical products or controls the opening and closing of the inlet and drain solenoid valves.
- Range up to 0 – 300 mS
- Conductive or inductive probes
- Automatic temperature compensation
- In by-pass, in-line or immersion
300mSMaximum range
2Measuring principles
3Probe positions
0 – 100°CMeasured temperature
How it works
Control principle
According to the measured conductivity and the set value, the controller drives dosing pumps, solenoid valves or other equipment.
ON/OFF control
The controller activates the output when the ON set point is exceeded, deactivates it when the OFF set point is reached and reactivates it when conductivity returns to the ON set point.
Dosing and drain
The dosing pumps can dose chemical products according to the measured conductivity; solenoid valves or motorised valves manage the inlet and drain of the water.
Applications
Applications
Domestic water circuits
Domestic water circuits.
Industry
Industrial process water.
Probes
Conductive and inductive probes
Probes with graphite, stainless steel or high-linearity electrodes, based on the conductive or inductive principle.
Conductive
Four series: PVDF body with stainless steel electrodes (0 – 200 µS or 0 – 5 mS) or graphite electrodes (0 – 20 or 0 – 200 mS), stainless steel body and electrodes for immersion and high temperatures, epoxy body with high-linearity platinum electrodes.
Conductive probes →
Inductive
Particularly stable and accurate reading, as it is not affected by the polarisation and deposits typical of conductive probes; it measures even in still water, up to 300 mS. It must be installed with the flow directed at the end of the probe, avoiding deposits of solids and air bubbles.
Inductive probes →
Inductive probe
Measuring principle of the inductive probe
Inductive measurement is based on an output current proportional to conductivity. The probe consists of two elements, a coil and a resistor, housed in a cylindrical casing with a through hole: the alternating voltage applied to the coil creates an alternating magnetic field that generates in the fluid a current proportional to conductivity; this current induces a voltage in the resistor, which the receiver processes to determine conductivity.
In by-pass
In the flow-through probe holder.
In-line
Directly on the pipe.
Flow direction
The flow must be directed at the hole of the probe.
Immersion
Some models can also be installed by immersion.
Technical data
Probe data sheets
The controller measures conductivity up to 0 – 300 mS (µS or mS depending on the probe) and temperature from 0 to 100 °C (resolution 0.1 °C), with automatic compensation; conductive or inductive measurement, probe in by-pass, in-line or immersion.
Conductive probes – ECDC
PVDF body, graphite electrodes.
| Model | Mounting | Connection | Range | K factor | Temperature compensation |
|---|---|---|---|---|---|
| ECDC/1 | In-line / by-pass | R3/4" | 0 – 20 mS | 1 | – |
| ECDCC/1 | In-line / by-pass | R3/4" | 0 – 20 mS | 1 | NTC 10K |
| ECDCCPT/1 | In-line / by-pass | R3/4" | 0 – 20 mS | 1 | PT100 |
| ECDC/10 | In-line / by-pass | R3/4" | 0 – 200 mS | 10 | – |
| ECDCC/10 | In-line / by-pass | R3/4" | 0 – 200 mS | 10 | NTC 10K |
| ECDCCPT/10 | In-line / by-pass | R3/4" | 0 – 200 mS | 10 | PT100 |
| ECDCIM/1 | Immersion | G1/2" | 0 – 20 mS | 1 | – |
| ECDCCIM/1 | Immersion | G1/2" | 0 – 20 mS | 1 | NTC 10K |
| ECDCCIMPT/1 | Immersion | G1/2" | 0 – 20 mS | 1 | PT100 |
| ECDCIM/10 | Immersion | G1/2" | 0 – 200 mS | 10 | – |
| ECDCCIM/10 | Immersion | G1/2" | 0 – 200 mS | 10 | NTC 10K |
| ECDCCIMPT/10 | Immersion | G1/2" | 0 – 200 mS | 10 | PT100 |
Operating temperature 1 – 60 °C (100 °C at 2 bar), operating pressure 7 bar (2 bar at 100 °C).
Conductive probes – ECDI
PVDF body, stainless steel electrodes.
| Model | Mounting | Connection | Range | K factor | Temperature compensation |
|---|---|---|---|---|---|
| ECDI/1 | In-line / by-pass | R3/4" | 0 – 5 mS | 1 | – |
| ECDIC/1 | In-line / by-pass | R3/4" | 0 – 5 mS | 1 | NTC 10K |
| ECDICPT/1 | In-line / by-pass | R3/4" | 0 – 5 mS | 1 | PT100 |
| ECDI/01 | In-line / by-pass | R3/4" | 0 – 200 µS | 0.1 | – |
| ECDIC/01 | In-line / by-pass | R3/4" | 0 – 200 µS | 0.1 | NTC 10K |
| ECDICPT/01 | In-line / by-pass | R3/4" | 0 – 200 µS | 0.1 | PT100 |
| ECDIIM/1 | Immersion | G1/2" | 0 – 5 mS | 1 | – |
| ECDICIM/1 | Immersion | G1/2" | 0 – 5 mS | 1 | NTC 10K |
| ECDICPTIM/1 | Immersion | G1/2" | 0 – 5 mS | 1 | PT100 |
| ECDIIM/01 | Immersion | G1/2" | 0 – 200 µS | 0.1 | – |
| ECDIIM/02 | Immersion | G1/2" | 0 – 500 µS | 0.2 | – |
| ECDICIM/01 | Immersion | G1/2" | 0 – 200 µS | 0.1 | NTC 10K |
| ECDICPTIM/01 | Immersion | G1/2" | 0 – 200 µS | 0.1 | PT100 |
Operating temperature 1 – 60 °C (100 °C at 2 bar), operating pressure 7 bar (2 bar at 100 °C).
Conductive probes – ECDHL
Epoxy body, platinum electrodes, diameter 12 mm.
| Model | Mounting | Range | K factor | Temperature compensation |
|---|---|---|---|---|
| ECDHL/1 | In-line / by-pass | 0.2 – 20 mS | 1 | – |
| ECDHLC/1 | In-line / by-pass | 0.2 – 20 mS | 1 | NTC 10K |
| ECDHLCPT/1 | In-line / by-pass | 0.2 – 20 mS | 1 | PT100 |
| ECDHL/01 | In-line / by-pass | 0 – 200 µS | 0.1 | – |
| ECDHLC/01 | In-line / by-pass | 0 – 200 µS | 0.1 | NTC 10K |
| ECDHLCPT/01 | In-line / by-pass | 0 – 200 µS | 0.1 | PT100 |
| ECDHL/10 | In-line / by-pass | 20 – 200 mS | 10 | – |
| ECDHLC/10 | In-line / by-pass | 20 – 200 mS | 10 | NTC 10K |
| ECDHLCPT/10 | In-line / by-pass | 20 – 200 mS | 10 | PT100 |
Operating temperature 1 – 70 °C, operating pressure 7 bar.
Conductive probes – EICDC
Stainless steel body and electrodes, R3/4" connection, in-line or by-pass mounting.
| Model | Range | K factor | Temperature compensation | Operating temperature |
|---|---|---|---|---|
| EICDC/1 | 0 – 20 mS | 1 | NTC 10K | 1 – 130 °C |
| EICDCPT/1 | 0 – 20 mS | 1 | PT100 | 1 – 130 °C |
| EICDC/01 | 0 – 200 µS | 0.1 | NTC 10K | 1 – 130 °C |
| EICDCPT/01 | 0 – 200 µS | 0.1 | PT100 | 1 – 130 °C |
| EICDC/001 | 0 – 20 µS | 0.01 | NTC 10K | 1 – 130 °C |
| EICDCPT/001 | 0 – 20 µS | 0.01 | PT100 | 1 – 130 °C |
| EICDCHPT/1 | 0 – 20 mS | 1 | PT100 | 1 – 200 °C |
| EICDCHPT/01 | 0 – 200 µS | 0.1 | PT100 | 1 – 200 °C |
| EICDCHPT/001 | 0 – 20 µS | 0.01 | PT100 | 1 – 200 °C |
Operating pressure 15 bar.
Inductive probes
| ECDINDPT | ECDSINDPT | |
|---|---|---|
| Measuring range | 0.3 – 3 mS 0.3 – 30 mS 0.3 – 300 mS | 0.3 – 10 mS |
| Measuring system | Inductive | Inductive |
| Body | PEEK | PEEK |
| Mounting | In-line / by-pass / immersion | In-line / by-pass / immersion |
| Temperature compensation | PT100 | PT100 |
| Operating temperature | 1 – 85 °C (100 °C for temporary measurement) | 1 – 85 °C (100 °C for temporary measurement) |
| Operating pressure | 8 bar | 8 bar |
Installation
Electrode positioning
Electrode positioning is defined according to the characteristics of the installation and of the water to be analysed.
In by-pass
The probes are housed in a PEF flow-through probe holder or an NPED probe holder, connected to a water tapping point at the tank outlet and fed with about 30 l/h of sample water. A flow sensor can be added, which stops dosing when there is no flow.
Probe holders →
Immersion
The electrode is immersed directly in the storage tank of the water to be treated, by means of an immersion probe holder.
Probe holders →
In-line
The electrodes are inserted directly into the pipe carrying the water to be treated.
Probe holders →
Correct position
Probe positioning
The flow must strike the end of the probe, so as to avoid air bubbles and sediment deposits that alter the reading.
Correct
Flow directed at the end of the probe.
Correct
On a vertical section, with upward flow.
Incorrect
Deposits of impurities and solids.
Incorrect
Air bubbles around the probe.
Incorrect
Air bubbles around the probe.
Incorrect
Air bubbles and deposits of solids.
Controller
The controller
It acquires the measurement from the probe and drives the dosing pump in proportion to the value detected. It is supplied pre-assembled on a panel, ready for connection.
Colour display
Multicolour backlit display that indicates the different operating states by changing colour. Programming via a single knob.
Four modes
Proportional, ON/OFF, PWM and PID dosing, with delayed dosing start.
Data storage
Permanent data storage and a system log viewable on the display; the internal log can be exported to a USB memory stick for processing with a spreadsheet.
Alarms
Chemical level, no flow, maximum dosing time exceeded, probe failure, out-of-range reading; acoustic or visual signalling via the alarm output.
The dosing pump, with flow rate and back-pressure defined at the time of ordering, is connected to the pulse output (and/or 0-4/20 mA) and operates in proportional or ON/OFF mode. A pre-calibrated injection valve and a magnetic level probe with coaxial foot filter, which stops the pump when the chemical runs out, are supplied as standard.
Colour display
Colour-coded status indication
By changing colour, the controller’s backlit display indicates the different operating states, which can be recognised even from a distance.
Normal operation
Measurement and dosing according to the set parameters.
Stand-by
Controller in stand-by.
Warning
Warning signal, for example the chemical level.
Alarm
Alarm signal, for example from the probe.
Settings from the display
Data sheet
Controller data sheet
Inputs, outputs, control modes and alarms of the controller.
Inputs
- Measuring probe
- Temperature
- Flow sensor
- Chemical level
- Pulse-output water meter or mA signal
Outputs
- 1 proportional dosing pump
- 1 digital output
- 2 proportional 0-4/20 mA outputs
Control
- Proportional
- ON/OFF
- PWM
- PID
- Delayed start
Alarms
- Chemical level
- No flow
- Maximum dosing time
- Probe failure
- Out-of-range reading
Power supply
- 230 VAC
- 12 – 24 VDC
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 Optional, one of these
Connection to the web portal via network cable: measurements, set points, dosing and alarms accessible from PC, tablet and smartphone.
Wi-Fi Optional, one of these
Wireless connection to the web portal, with the same functions as the cable connection.
4G Optional, one of these
Connection via the cellular network for installations without a local network, with alarm notification by SMS or e-mail.
Modbus RTU Standard (standard models), optional (PLUS)
Integration into your PLC via serial port.
0-4/20 mA output Standard (PLUS), optional (standard models)
Current signal proportional to the measured value, for remote monitoring or for controlling pumps and other instrumentation.
One communication type at a time: Ethernet, Wi-Fi, 4G or Modbus RTU (built into the standard versions, optional on the PLUS versions). 4/20 mA outputs and meter input standard on the PLUS versions, optional on the standard versions.
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.
Optional extras
Optional accessories
Accessories available on request to adapt the system to the requirements of the installation.
Tank
PE tanks for the chemical, with safety bund.
Details →
Pulse-output water meter
Enables dosing proportional to the volume of water actually treated.
Details →
Flow sensor
Installed on the pump delivery line, it verifies that dosing actually takes place.
Details →
Static mixer
Ensures the chemical is mixed with the water and protects the pipe from direct contact.
Details →
Pulsation dampener
Attenuates the pulsations generated by the dosing pump.
Details →
Injection lance
Injects the chemical into the centre of the pipe.
Details →
Multifunction valve
Pressure, safety and anti-siphon functions combined in a single valve.
Details →
Solenoid valve
Operated by the controller according to the measured value.
Technical advice
Tell us the type of water to be treated and the loads to be controlled: we will propose the most suitable probe, probe holder, pumps and accessories.