Illustration: water-monitoring site with field instruments, an RTU enclosure and tank infrastructure.
Check irrigation or aquaculture water
Follow the selected water-quality parameter over time, then compare unusual readings with a field check. Probe placement, cleaning and calibration are part of keeping the record useful.
Monitor a water-treatment point
Treatment and process teams can collect readings from suitable tanks or lines. Confirm the medium, temperature, pressure and mounting before choosing a probe; one parameter does not describe every aspect of water quality.
Specifications & version options
Measured property
Online electrical conductivity (EC)
Type A / B ranges
0–2000 / 5000 / 10000 / 20000 µS/cm
Type C ranges
0–2000 / 5000 / 10000 / 20000 µS/cm; custom ranges confirmed per order
Type D ranges
0–50 / 500 / 10000 / 20000 µS/cm
Accuracy / resolution
±1% FS; 0.01 mS/cm
Outputs
4-20 mA and RS485 Modbus RTU simultaneously; Type D two-wire 4-20 mA optional
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Supply
7–30 VDC; Type D two-wire 4-20 mA configuration 22–28 VDC
Response / drift
1 s response; ≤0.3% FS per 24 h drift
Power
<0.2 W
Temperature compensation
0–60 °C on Types A/B/C; Type D configuration up to 0–100 °C
Materials
Type A ABS/graphite; Type B nylon fibre/316; Type C nylon fibre/graphite; Type D 316L/PEEK
Pressure
Type A 0.8 MPa; Types B/C 1.0 MPa; Type D 2.0 MPa
Installation
Immersion or NPT3/4 process connection, depending on type
Environment / cable
Probe IP68; standard 5 m cable
Need to connect this equipment to an existing controller or platform?
Share your current model, a photo or the connection you need. We help assess interfaces, power and the required configuration.
Public documents describe this product family and selection options. Wiring, register maps and compliance documents must match the model and version selected for your order.
Customer platform or an agreed third-party service
How the model is selected
Check the installation, electrical interfaces and documents before choosing the model.
Site requirement
Application, medium, mounting and environment
Hardware configuration
Signal, protocol, power and enclosure
Your quotation
Model, quantity, certificates and delivery
Connecting field equipment
Illustration: remote-monitoring integration with field enclosure, gateway, power and industrial equipment.
Choose the probe type from the medium, pressure and temperature
The four mechanical families do not share the same wetted materials or service limits.
Type A uses an ABS body with graphite electrodes and is rated to 0.8 MPa. Type B uses nylon fibre with 316 stainless steel; Type C uses nylon fibre with graphite. Types B and C are rated to 1.0 MPa.
Type D uses 316L and PEEK wetted materials, supports the high-temperature configuration and is rated to 2.0 MPa. Confirm whether the installation uses the Type D two-wire 4-20 mA option or the standard simultaneous-output configuration.
Select a documented range. Types A/B/C support 0-2000, 0-5000, 0-10000 or 0-20000 µS/cm; Type C also supports custom ranges confirmed for the order. Type D supports 0-50, 0-500, 0-10000 or 0-20000 µS/cm.
Show 4 more selection notes
Install the conductivity cell where it remains wetted and where bubbles do not collect across the measurement opening. Confirm immersion depth or NPT3/4 process geometry before release.
The probe is not maintenance-free: deposits, oil, biofilm and scale change the cell response. Define cleaning access, inspection frequency and the reference solution or comparison method.
IP68 applies to the probe. Cable entries, junctions, controllers and enclosures require their own environmental protection.
A matching manual documents calculated TDS and salinity data, but the direct measurement is EC. Confirm the ordered firmware/register set, conversion, units, temperature basis and acceptance method before using either derived value.
Continue product selection
Compare adjacent hardware families for the same monitoring path.
Select Type A, B, C or D from the water chemistry, wetted material, process pressure, temperature, installation connection and required EC range.
Choose the documented range before release. Type A/B/C cover 0-2000 to 0-20000 µS/cm; Type D also provides the 0-50 and 0-500 µS/cm low-range options.
Use the standard simultaneous 4-20 mA and RS485 Modbus RTU outputs, or deliberately select the separate Type D two-wire 4-20 mA configuration.
Place the measurement opening where it remains wetted and bubbles do not collect. Confirm immersion depth or NPT3/4 process geometry.
Show 2 more selection checks
Define cleaning access, inspection frequency and the reference solution or comparison method. Deposits, oil, biofilm and scale change the cell response.
Treat EC as the direct measurement. The matching manual documents calculated TDS and salinity data, but the ordered register set, conversion, units, temperature basis and acceptance method must be confirmed before use.
Compatible with
PLC, RTU or analyzer inputs accepting 4-20 mA and RS485 Modbus RTU
Immersion brackets or NPT3/4 process connections selected for the probe family
Water-quality controllers and telemetry gateways using the model-specific register map
Freshwater, wastewater or process installations whose material, pressure and temperature limits match the selected type
Typical package
Type A, B, C or D conductivity probe selected for medium, range, pressure and temperature
Standard 5 m cable or a project-specific cable length
Optional 1 m immersion bracket or matching NPT3/4 process hardware
Compatible PLC, RTU, analyzer or gateway with analog and/or RS485 input
Cleaning, calibration and acceptance-reading plan for the process
Applications
Instruments, enclosure, power and mounting are selected for the actual tank, well, reservoir or pump station.
This probe family measures online electrical conductivity in water and compatible process media. Select Type A, B, C or D from the wetted material, pressure, temperature, connection and range. The standard three- or four-wire configurations provide 4-20 mA and RS485 Modbus RTU simultaneously; the Type D two-wire 4-20 mA option is a separate configuration. Conductivity is the direct measured property. A matching manual documents calculated TDS and salinity data on applicable configurations, but availability, units, conversion and temperature basis must be confirmed before those derived values are used.
Freshwater, aquaculture and surface-water conductivity trend monitoring
Wastewater and process-water monitoring after wetted-material and fouling review
Pipe or tank installations using simultaneous analog and Modbus signals
Higher-temperature or higher-pressure service using the selected Type D configuration
Check water chemistry, wetted-material compatibility, process pressure, temperature, connection and range. Type A is ABS/graphite to 0.8 MPa, Types B and C are nylon-fibre constructions to 1.0 MPa, and Type D uses 316L/PEEK for the higher-temperature and 2.0 MPa service.
Are 4-20 mA and RS485 Modbus RTU available at the same time?
Yes on the standard three- or four-wire configurations. Type D also has a separate two-wire 4-20 mA option with a 22-28 VDC supply requirement, so the wiring version is fixed in the quotation.
Which conductivity ranges are supported?
Types A, B and C support 0-2000, 0-5000, 0-10000 or 0-20000 µS/cm, with custom ranges confirmed per order on Type C. Type D supports 0-50, 0-500, 0-10000 or 0-20000 µS/cm. Accuracy is ±1% FS and resolution is 0.01 mS/cm.
Does this sensor provide TDS or salinity values?
The direct measurement is electrical conductivity. A matching manual documents calculated TDS and salinity data on applicable configurations, but the ordered firmware/register set, units, conversion, temperature basis and comparison method must be confirmed before those derived values are used.
What installation and maintenance details should be provided?
Provide immersion or pipe geometry, NPT3/4 connection needs, pressure, temperature, cable length, flow, bubble risk, likely deposits and cleaning access. Include the calibration or comparison method and the receiving PLC, RTU or analyzer.
What should I provide when requesting a quote for the Water Conductivity (EC) Sensor?
Water or process medium, expected normal / upset conductivity and units; Required Type A / B / C / D material, range, pressure and temperature; Immersion depth or NPT3/4 process connection, flow and bubble risk; Simultaneous 4-20 mA / RS485 or Type D two-wire output, receiving PLC / RTU / analyzer and supply
Where can I compare available model options?
Open the Application selection guide linked on this page. Use it to compare equipment options before requesting a configuration.
Will it work with my existing system?
Check the field signal, supply, protocol and receiving platform against the selected model. The connection options listed on this page are a starting point; send your equipment model or interface document so we can check the combination before ordering.
Product-family reference. Final ordered model and specifications are confirmed in the written quotation.
