ECTDSRM6850 Conductivity TDS Resistivity Controller China Suppliers Factory

High-performance ECTDSRM-6850 online Conductivity TDS and Resistivity controller for precise water monitoring. Reliable industrial solutions from leading China suppliers and factory with Modbus RS485 and 4-20mA output.

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Product Details

The EC/TDS/RM-6850 is a high-performance industrial controller designed for the precise online monitoring of Conductivity, Total Dissolved Solids (TDS), and Resistivity. Engineered for durability and accuracy, this instrument integrates advanced CPU processing with robust electromagnetic compatibility, making it an essential tool for critical water quality management in demanding industrial environments.

Equipped with a versatile interface and multiple output options—including 4-20mA current signals and Modbus RS485 communication—the EC/TDS/RM-6850 ensures seamless integration into automated control systems. From seawater desalination and reverse osmosis to pharmaceutical and food-grade water treatment, it provides the reliability and precision required to maintain strict water quality standards.

Detailed Parameters

Measuring Range (Cond)	0-200uS to 0-600mS (Sensor dependent)	TDS Range	0-100ppm to 0-99,999ppm
Resistivity Range	0-18.25MΩ·cm / 0-18250KΩ·cm	Accuracy	± 1.5% (Full Scale)
Temperature Comp.	0～120 ℃, Automatic (PT1000)	Sensor Constants	0.01, 0.1, 1.0, 10.0, 30.0 cm-1
Output Signals	4-20mA Isolated / Modbus RS485 (Opt)	Control Output	High/Low Limit relay (3A/250V AC)
Protection Grade	IP 65 / Panel Mounted (92x92mm hole)	Power Supply	AC 220V / 110V / DC 24V (Optional)

Key Advantages

Industrial Protection

Featuring IP65 protection, MOV, fused AC input, and ESD over-voltage protection for maximum stability.

Intelligent Control

Optional PID control to actuate variable values via 4-20mA output for precise process automation.

High Precision

High-performance CPU and PT1000 automatic temperature compensation ensure laboratory-grade accuracy.

Smart Display

12864 dot matrix LCD with adjustable brightness and power-saving automatic off mode.

Flexible Calibration

Direct input of conductivity constants or probe calibration via known solution values.

Secure Management

Integrated password management system prevents unauthorized parameter modifications.

Product Gallery

Management Platforms

Remote Monitoring

Utilize Modbus RS485 to integrate water quality data into centralized SCADA or PLC systems.

Automated Dosing

4-20mA output enables precise control of dosing pumps for chemical water treatment.

Limit Alarms

Configurable high/low limit relay outputs provide instant alerts for water quality deviations.

Delay Settings

Adjustable alarm delay prevents false triggers caused by momentary signal fluctuations.

Multi-Sensor Support

Compatible with NPT or Flanged sensors for various pipe sizes and installation requirements.

Energy Management

LCD power-saving mode and timing automatic off reduce energy consumption in 24/7 operations.

Investment Return Comparison

Feature	Standard Controller	EC/TDS/RM-6850
Integration Cost	High (External Modules)	Low (Integrated Modbus/4-20mA)
Calibration Time	Manual/Slow	Fast (Direct Constant Input)
Maintenance Cycle	Frequent (Low Protection)	Extended (IP65 & ESD Guard)
Operational Risk	High (Open Access)	Low (Password Protected)
System Accuracy	Standard	High (PT1000 Compensation)

Frequently Asked Questions

Q: What is the primary application of the EC/TDS/RM-6850 in water treatment?

It is widely used for online monitoring and control in seawater desalination, reverse osmosis (RO), pharmaceutical water systems, aquaculture, and environmental protection facilities.

Q: How does the device handle temperature fluctuations?

The controller features automatic temperature compensation from 0 to 120℃ using a PT1000 sensor, ensuring accurate readings regardless of thermal changes.

Q: Can the EC/TDS/RM-6850 be integrated into a PLC system?

Yes, it supports both isolated 4-20mA current output and optional Modbus RTU RS485 communication for seamless PLC/SCADA integration.

Q: What sensor connection options are available?

The instrument supports 1/2” NPT (standard), 3/4” NPT (optional), and Flanged connections to accommodate various industrial piping standards.

Q: How is the device protected against electrical surges?

The device includes MOV protection, fused AC inputs, and ESD over-voltage protection to safeguard the electronics from industrial electrical noise and spikes.

Q: Is it possible to calibrate the probe constant directly?

Yes, users can either input the conductivity constant directly or calibrate the probe constant based on the value of a known calibration solution.

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FAQS

What's the MOQ?

1set sample is available.

What's your price?

We quoted based on your products’ code and qty. We can offer different discount depending on qty.

I am not sure of the required product type, how to get quotation?

Please tell us the details of your project: Measuring range, temperature, pressure, If need relay control output, 4-20mA or Modbus RS485 output? We will choose suitable product type as per your project details and make quotation for you.

How long is your delivery time?

Most of our products are in stock. Generally, we can delivery to you within 2-3 working days. The big order’s delivery time will be determined according to the type and quantity of products ordered.

What’s your term of payment?

We accept T/T, Paypal, Western Union, Alipay, credit card, wechat and other suitable payment.

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