EC/TDS-500/600 Water Quality Meter for Accurate Measurement

Čvc . 30, 2025

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.

EC/TDS-500/600 Water Quality Meter for Accurate Measurement

Industry Trends in Conductivity & TDS Management

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.

Technical Specifications: EC/TDS-500/600 at a Glance

Key Specifications Table: 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

Technology & Manufacturing: From Concept to Application

1. Material Selection

Premium-grade 316L stainless steel and engineered PEEK plastics, ensuring high anti-corrosiveness, food-grade non-toxicity (meets FDA 21CFR177.1550), and extended service life even in aggressive fluids.

2. Precision Machining

All core electrodes are CNC-machined and mirror-polished to

3. Module Integration

Integration of temperature, conductivity, and TDS circuits, tested for EMC immunity (per IEC 61326). Modular wiring for reliability and ease of expansion.

4. Calibration & QC

100% unit calibration with traceable standard solutions, pressure/vibration/temperature cycling; ISO17025-referenced precision test before packing.

5. Assembly

Cleanroom/manual hybrid assembly. Each unit sealed with laser etching for traceability; conformal coating applied for PCB humidity protection.

6. Packaging & Shipping

ESD-safe packaging; each product serialized and accompanied by calibration certificate, manual, wiring diagrams, and digital logbook.

ISO9001:2015 FDA 21CFR ANSI/ISA-75.05.01 Production fully complies with international quality and safety directives.

How Does EC/TDS-500/600 Perform? Data Visualization & Benchmarking

Technical Index Comparison Chart (EC/TDS-500, EC/TDS-600, Mainstream Competitors)

Source: WATEQ Data, 2024

TDS Measurement Capability Distribution (EC/TDS-600, Market Share by Application)

Market report: ResearchGate

Long-term Stability (Drift Test – 2 Years, ppm)

Validated by 3rd Party Laboratory, 2023

Competitive Comparison Table

EC/TDS-500/600 vs Major International Brands
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

Customization Solutions: Built for Complex Realities

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.

OEM labeling and interface language options
Specialized ex-proof (ATEX) or food industry compliance
High-temperature brine (up to 130°C) sensor modules
Real-time cloud reporting via MQTT/REST API

Typical Application Scenarios & Advantages

1. Petrochemicals

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.

Continuous inline EC/TDS control triggers dosing/valve logic
Proven 0.2% long-term drift (2-year data, below 0.5 ppm/day)
3M, Shell, Sinopec among users (2020–2023, feedback available on request)

2. Metallurgy & Mining

For closed-circuit cooling, leaching, and wastewater, the anti-fouling electrode design with PEEK body ensures stable readings in high-sediment, high-salinity environments.

Tolerance: up to 200,000 mg/L TDS, 110°C
Custom MODBUS for SCADA (Emerson/Rockwell) interfacing
Zero-drift for 12 months: test report available from SGS

3. Water Supply & Urban Utilities

Widely adopted in desalination, RO, and potable water plants. Multi-point calibration and user-settable alarms enhance process safety and regulatory compliance.

Compliance: ISO24512 ANSI/AWWA C653
24/7 web interface for data traceability (API-ready)
User satisfaction > 96% (survey: 151 installs, 2023)

4. Agriculture & Food Industry

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.

Typical ROI: 8–10 months per feedback (AgroChem trial, 2022)
Food-contact materials, FDA tested

5. HVAC, Chillers & Boilers

Used for anti-scaling and system health monitoring in commercial properties. EC/TDS-500/600 supports BACnet gateway and on-site dashboard display.

3 year average operational lifetime (in system water)
Less than 0.15% annual maintenance downtime

Technical Advantages: Why Choose EC/TDS-500/600?

Unmatched accuracy and repeatability – certified per ISO7027 and ASTM D1125
Superior anti-fouling & self-cleaning function (PTFE/PEEK electrodes, patented cleaning wiper optional)
Extended service life: ≥60 months (24/7), average MTBF: >14,000 hr
Ultimate compatibility: MODBUS, 4-20mA, relay, Ethernet; integration with all mainstream DCS/PLC
Smart alarming and logging: 10 years non-volatile data memory, customizable thresholds
Full compliance: ISO, ANSI, FDA, and CE. Third-party validation available

Worldwide Clients & Endorsements

Cooperation Partners: Veolia Water, Siemens, Dow Chemical, Suez Group, PetroChina, and CNOOC.
Endorsements: SGS, TUV Rheinland, DNV GL
Certifications: ISO9001, ANSI, FDA 21CFR

User Positive Feedback

“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

FAQ: Professional and Technical FAQ

1. What is the difference between measuring conductivity (EC) and TDS?

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.

2. What makes 316L Stainless Steel & PEEK the preferred electrode materials?

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.

3. What compliance/standardization is provided?

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.

4. How is remote calibration performed?

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.