Online Digital RS485 Conductivity Meter for Water

This single-channel universal instrument features dual SPST relays and analog 0/4-20mA current outputs to enable automated cleaning, limit alarms, and real-time data transmission for continuous water conductivity or salinity monitoring systems.

Model： DUC2-EC
Measuring Parameter： Conductivity
MOQ： 1
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Show All Products: Show Conductivity Sensor & Controller

Overview

Information

Display Range: 0~999.99mS/cm
Resolution: 0.001µS/cm
Protection Grade: IP66

Output

Two SPST relays
A 2-wire RS485 interface, MODBUS RTU
Two 0/4~20 mA current outputs

Features

Digital RS485 Sensor Connection

The online digital conductivity controller is optimized for RS485 digital EC sensors. Strong anti-interference performance for long-distance signal transmission.
Wide Multi-parameter Display

Real-time multi-parameter reading of conductivity, resistivity, TDS, salinity and temperature. Compatible with 2-electrode & 4-electrode digital conductivity sensors with flexible measuring ranges for diverse water conditions.
Flexible Process Control& Data Traceability

Customizable relay trigger for alarm, dosing and cleaning control. Built-in data logger with timestamped records for easy process traceability and data export.

Application

The digital conductivity meter is suitable for scenarios that require stable long-distance signal transmission. It is widely adopted in pure water RO systems, boiler water, circulating cooling water, electroplating wastewater, chemical process water and municipal water projects. Digital sensor connection minimizes signal drift and guarantees reliable long-term water quality monitoring.

Applicable Scenarios

Water & Wastewater
Aquaculture
Energy & Power Generation
Food & Beverage
Agriculture & Hydroponics
Plating

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Parameter	DUC2-EC
Sensor Input	Single-channel digital conductivity sensor input for water
Display Range	Conductivity: 0~999.99mS/cm (measuring range related to the sensor); Resistivity: 0~99.99MΩ.cm (measuring range related to the sensor); TDS: 0~999999ppm (measuring range related to the sensor); Salinity(‰): 0~1000ppt (measuring range related to the sensor); Temperature: -10～500℃ /14~932℉ (measuring range related to the sensor);
Resolution	Conductivity: 0.001µS/cm(0~10µs/cm), 0.01µS/cm(10~100µs/cm), 0.1µS/cm(100~1000µs/cm), 1µS/cm(1000~10000µs/cm), 0.01mS/cm(10~999.99mS/cm); Resistivity: 1Ω.cm(0≤resistivity＜1000000), 0.01MΩ.cm(1≤resistivity≤99.99); TDS: 1ppm; Salinity: 0.01ppt; Temp: 0.1℃/ 0.1℉
Relay Output	Two SPST relays, Max. load 3A/250VAC, set high/low alarm, temp., wash control
Digital Output	2-wire RS485 interface, MODBUS RTU
Current Output	Two settable 0/4~20mA current, Max. load 1000Ω
Display Screen	128 x 64 LCD, adjustable backlight mode, adjustable display rate
Configuration	Power-off protection, parameters are retained indefinitely
Electronic clock	Display year/month/day/hour/minute/second
Historical Data	Historical data query and download, record last 100 calibration data
Work Temperature	0～60℃， RH<95% ( no condensation)
Storage Temperature	-20～70℃， RH<55% ( no condensation)
Enclosure Material	Enhanced ABS
Protection Grade	IP66
Dimension	144mm×144mm×120mm (Hole size 138mm×138mm)
Installation	Wall mounting, pipe clamping, panel
Power Supply	AC: 100~240V 50/60Hz or DC:18~36V
Power Consumption	About 24W

Online Digital RS485 Conductivity Meter for Water