EC-702
Tenber EC-702 Conductivity Controller
Industrial conductivity, resistivity, salinity and TDS controller with dual isolated 4–20mA outputs and RS485 Modbus RTU. Confirm sensor…
View specifications →Tenber Liquid Analysis
Industrial Conductivity Meters & TDS Controllers
Industrial conductivity meters and TDS controllers help track dissolved ionic content in process water, reverse-osmosis systems and industrial cleaning processes. Select the controller and sensor together…
Product Range
Available Models
Compare verified specifications and send your process conditions for model selection.
EC-703
Tenber EC-703 Conductivity Controller
Industrial EC, TDS and resistivity controller with isolated 4–20mA output, two relay outputs, Pt1000 or NTC30K temperature compensation,…
View specifications →
ECS-7301
Tenber ECS-7301 Conductivity Meter
Industrial conductivity meter for EC, resistivity, salinity and TDS measurement with dual 4–20mA and RS485 Modbus RTU outputs.
View specifications →Conductivity Measurement
Industrial conductivity meters and TDS controllers for RO and process water
Industrial conductivity meters and TDS controllers help track dissolved ionic content in process water, reverse-osmosis systems and industrial cleaning processes. Select the controller and sensor together according to the expected range, liquid composition, temperature, installation method and control-system signal.
Typical Applications
Reverse-osmosis monitoring, industrial process water, chemical dosing, cleaning systems and water-treatment projects.
Selection Information
Confirm the conductivity range, sensor type, temperature conditions, wetted materials, cable length and installation position before ordering.
Control-System Integration
Tenber conductivity models include industrial signal options for connection to PLC or SCADA systems. Confirm the required 4–20mA, relay and RS485 configuration for the selected model.
Review industrial applications, learn about technical service, or send your process conditions for model selection.
Complete Measuring System
Match the controller, sensor and installation
Reliable online measurement depends on the complete configuration, not only the controller model.
Controller & Sensor Pairing
Low, medium and high conductivity ranges require different sensor constants and wetted materials. Confirm whether a contacting or inductive sensor is more suitable before selecting the controller range.
Recommended Project Fit
Best suited to reverse osmosis, rinse water, process water, cleaning systems and chemical concentration applications with a confirmed conductivity range.
See application solutions or send your process conditions for a controller and sensor recommendation.
Selection Guide
Information needed for an accurate recommendation
A controller should be selected together with the sensor, installation and signal requirements. Send the following information so the configuration can be reviewed before quotation.
- Measurement parameter and required range
- Liquid type and chemical composition
- Process temperature and pressure
- Sensor installation and cable length
- 4–20mA, relay or RS485 requirements
- Expected purchase quantity
Frequently Asked Questions
Can the controller connect to a PLC?
Selected models provide 4–20mA and RS485 Modbus RTU outputs. Confirm the exact interface when requesting a quotation.
Can Tenber recommend a matching sensor?
Yes. Send the liquid, range, temperature, pressure and installation method so the controller and sensor can be selected together.
Do you support batch and OEM supply?
Tenber supports distributor and project enquiries. OEM details are confirmed according to the model and order quantity.
Model Comparison
How to choose a conductivity TDS control unit
A conductivity TDS control unit should be shortlisted by the measurement mode, expected range and control-system interface—not by the product name alone. Confirm the cell constant, sensor material, process temperature, mounting and supplied controller configuration before ordering.
| Model | Measurement | Documented integration | When to consider it |
|---|---|---|---|
| EC-703 | Current conductivity-controller model; confirm the supplied measurement modes | Confirm current-model outputs, communication and relay configuration from the supplied variant | Shortlist when the EC-703 form factor or project specification is required, then verify the current manual before quotation. |
| EC-702 | Conductivity-related measurement modes documented for the model | Documented 4–20mA and RS485 Modbus RTU options; confirm channel and variant details | Projects that require the EC-702 measurement family or documented analogue and digital integration. |
| ECS-7301 | Conductivity-related measurement modes documented for the model | Documented 4–20mA and RS485 Modbus RTU options; confirm channel and variant details | Applications that need the ECS-7301 measurement family and a confirmed controller-and-cell configuration. |
The controller does not determine sensor suitability by itself. Match the measuring range and liquid to the correct cell constant, sensor material and installation method. Review the sensor and electrode range with the controller, then read how to select the conductivity sensor cell constant for the expected process range.
Reverse osmosis and purified water
Confirm the expected conductivity before and after each treatment stage. Low-conductivity and high-conductivity points may need different cell constants.
View the RO conductivity monitoring guide →Process and wastewater monitoring
Provide the liquid, normal and maximum range, temperature, pressure, deposits and cleaning conditions before sensor selection. If the project uses TDS, also confirm the conductivity-to-TDS conversion basis.
Read how conductivity is converted to TDS →Need a matched configuration?
Send the measurement mode, range, liquid, temperature, mounting, output, communication, quantity and destination country.
Discuss your application →For installation planning, follow the industrial conductivity probe installation guide after the model and sensor have been shortlisted.