EC/TDS-500/600 Water Quality Meter for Accurate Measurement
EC/TDS-500/600 is a state-of-the-art online conductivity and Total Dissolved Solids (TDS) controller—uniquely developed for modern industrial liquid monitoring demands. EC/TDS-500/600 sets benchmarks with robust hardware, advanced algorithms, and compliance with ISO/ANSI standards, earning widespread application in petrochemical, metallurgy, and water engineering sectors.
According to MarketsandMarkets, the global water quality sensor market is projected to surpass USD 2.6 billion by 2027, with industrial conductivity controllers accounting for over 32% share. Increased regulation, process digitization, and rising demand for precise liquid analytics are propelling growth of advanced modular products like EC/TDS-500/600.
| Parameter | EC/TDS-500 | EC/TDS-600 | Remarks |
|---|---|---|---|
| Measuring Range | 0.1 μS/cm – 200 mS/cm | 0.01 μS/cm – 200 mS/cm | Ultra-wide, covers ultrapure to industrial wastewater |
| TDS Measurement | 0 – 200,000 mg/L | 0 – 300,000 mg/L | High TDS capability, multipoint calibration |
| Accuracy | ±0.5% F.S. | ±0.3% F.S. | Industry leading (ISO7027 test conform) |
| Resolution | 0.01 μS/cm | 0.001 μS/cm | Detects subtle variations |
| Output | 4-20mA, RS485(MODBUS RTU) | 4-20mA, RS485/RS232, Relay | Multi-protocol, PLC/SCADA integration |
| Temp. Compensation | Auto/Manual (NTC/PT1000) | Auto/Manual (NTC/PT1000/PT100) | Precision under variable conditions |
| Display | 3.5” TFT LCD | 4.3” TFT LCD Touch | Clear graphics, data trend curves |
| Enclosure Rating | IP65 | IP66 | Waterproof/dustproof, robust design |
| Certifications | ISO 9001 CE | ISO 9001 ANSI CE | Complies with international authority standards |
| Feature | EC/TDS-500 | EC/TDS-600 | Brand X (USA) | Brand Y (DE) |
|---|---|---|---|---|
| Accuracy (@25°C) | ±0.5% F.S. | ±0.3% F.S. | ±1% F.S. | ±0.8% F.S. |
| Range | 0.1 μS/cm–200 mS/cm | 0.01 μS/cm–200 mS/cm | 1 μS/cm–100 mS/cm | 0.05 μS/cm–100 mS/cm |
| Temp. Compensation | Auto/Manual (NTC/PT1000) | Multi-sensor: NTC/PT1000/PT100 | NTC only | Auto/manual (NTC) |
| Display/Interface | 3.5’’ LCD | 4.3’’ Touch TFT | 2’’ LCD | 2.4’’ LCD |
| Remote Calibration | Supported | Supported | Not available | Supported (extra cost) |
| Communications | RS485 (MODBUS), 4-20mA | RS485/RS232 (MODBUS), Ethernet, 4-20mA | 4-20mA, RS485 | 4-20mA |
| Ingress Protection | IP65 | IP66 | IP54 | IP54 |
| Certification | ISO, CE | ISO, ANSI, CE | CE | CE |
| Warranty | 2 Years | 3 Years | 1 Year | 2 Years |
Our team offers tailored EC/TDS-500/600 solutions—linear/dual-channel configurations, anti-corrosion/high brine sensors, wireless telemetry, and panel/rack/in-pipe mounting. Upon technical consultation, we simulate process fluids and customize calibration/firmware to match your data ecosystem.
EC/TDS-500/600 monitors process brine and condensate purity, preventing corrosion and deposits even under high-conductivity and variable temperature (e.g., 85°C, pH 2–11). Resistant to alkali and acid vapors, supporting 24/7 plant operations.
For closed-circuit cooling, leaching, and wastewater, the anti-fouling electrode design with PEEK body ensures stable readings in high-sediment, high-salinity environments.
Widely adopted in desalination, RO, and potable water plants. Multi-point calibration and user-settable alarms enhance process safety and regulatory compliance.
Enables precise fertigation and irrigation control, tolerant to high-organic content irrigation water (tested: BOD up to 560 mg/L). Electrode surface prevents biofilm accumulation, reducing service requirements.
Used for anti-scaling and system health monitoring in commercial properties. EC/TDS-500/600 supports BACnet gateway and on-site dashboard display.
“After adopting EC/TDS-600 for our cooling tower conductivity control (plant, Suzhou), calibration frequency plummeted to once per 9 months and online accuracy is consistently — Technology Director, Sinopec JV
Electrical Conductivity (EC) refers to how well water conducts electrical current, reflecting the concentration of ions. TDS (Total Dissolved Solids) quantifies all dissolved minerals/salts (mg/L). The EC/TDS-500/600 uses a conversion factor (usually 0.5~0.7 for natural waters) with temperature compensation to provide both readings directly.
316L stainless steel offers unparalleled corrosion resistance even in highly acidic or alkaline solutions. PEEK (polyether ether ketone) is chemically inert, high temperature resistant (<150°C), and prevents biofouling/adherence of sludge—ensuring longevity and stability.
EC/TDS-500/600 strictly complies with ISO9001:2015, ANSI/ISA-75.05.01 for instrument safety, IEC61326 for EMC, FDA 21CFR for food industry, and CE requirements for international trade. Each batch is batch-tested to ISO/IEC 17025.
Using the provided MODBUS command set or cloud dashboard, you can remotely command the device to perform multi-point calibration via standard solutions. All steps are logged and fail-safe routines ensure QC/traceability.
Can be panel-mounted (DIN 96x96mm), using supplied gasket for IP65/NEMA
Related Products
Related News


2025-12-13 17:40:05
Comprehensive Guide to pH and ORP Sensors for Water Quality MonitoringUnderstanding pH and ORP Sensors: Why They Matter At first glance, a pH and ORP sensor might sound l
2025-12-13 15:20:05
Comprehensive Guide to ORP and pH Meter: Uses & Benefits WorldwideUnderstanding ORP and pH Meters: Why They Matter Worldwide Whether you're diving into water quality
2025-12-13 14:15:05
Understanding pH ORP Meters: Key Tech for Water Quality ControlWhy pH ORP Meters Matter in Today’s Global Water Management Water quality is undoubtedly one o
2025-12-13 14:10:06
ROS-2210 Industrial Device – Rugged, Compact, ReliableROS-2210 is a key solution in the High-end equipment manufacturing industry, specifically within int
2025-12-13 11:45:06
Solenoid Valve | Reliable, Fast-Acting, Leak-Tight ControlSolenoid Valve is a key solution in the General equipment manufacturing industry, specifically withi
2025-12-13 10:15:06
Understanding pH and ORP Monitors for Industrial Water ManagementWhy pH and ORP Monitors Matter in Industrial Water Treatment Having spent a fair chunk of my career
2025-12-13 09:15:05
Reliable pH ORP Monitor Solutions for Industrial Water SystemsWhy a pH ORP monitor is a must-have in industrial water management Having spent more years than I'd
2025-12-13 07:25:05
Soil Tester-LCD Screen – 3-in-1, Backlit, Fast, AccurateSoil Tester-LCD Screen is a key solution in the instrumentation and meters industry, specifically wi
If you are interested in our products, you can choose to leave your information here, and we will be in touch with you shortly.