High-Precision Digital TDS Meters & Total Dissolved Solids Analyzers

As a premier ISO-certified B2B manufacturer of electrochemical instruments, Hangzhou Qiwei Instrument Co., Ltd. produces commercial-grade TDS Meters (Total Dissolved Solids Analyzers) engineered for RO water purification monitoring, boiler feed water testing, environmental analysis, and agricultural water quality control.

Equipped with advanced electrolytic conductivity conversion algorithms, microcomputer processing circuits, and Automatic Temperature Compensation (ATC), our TDS meters deliver rapid, highly accurate, and stable total dissolved solids and salinity readouts.

Get Bulk Wholesale Quote Download TDS Meter Specification

Pocket TDS Tester
Model: TDS-1H (High range), TDS-1L (Low range)
Measuring range: 0~9999 PPM, 0~2500 PPM
Accuracy: ±2% FS
Resolution: 1 PPM

Explore Our TDS Testing Instrument Series

Versatile total dissolved solids testing options designed for portable field inspection, precision benchtop laboratory analysis, and continuous industrial monitoring.

1. Laboratory Benchtop TDS / EC Meters

High-accuracy benchtop instruments featuring large backlit LCD displays, selectable TDS conversion factors, and USB data transmission for certified R&D water testing laboratories.

TDS Range: 0.0 mg/L to 100.0 g/L (ppm)
Selectable TDS factor (0.40 to 1.00)
GLP compliant memory for up to 1000 data sets

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2. Portable Field TDS Testers

Rugged handheld meters packaged in waterproof field cases with platinum conductivity/TDS probes for rapid on-site water purity verification in rivers, wells, and RO maintenance.

IP65 waterproof housing with rechargeable battery
Automatic temperature compensation (ATC)
Quick-connect probe inputs for field operations

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3. Online Industrial TDS Process Controllers

Continuous 24/7 online TDS sensors and industrial transmitters designed for automated RO water treatment systems, boiler blowdown control, and industrial process pipelines.

4-20mA / RS485 Modbus PLC integration
Relay control output for automated RO flushing/dosing
Corrosion-resistant IP68 industrial immersion body

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Critical Industrial Applications & Engineering Strengths

Why Total Dissolved Solids (TDS) Monitoring is Vital

TDS measures the combined total content of all inorganic and organic substances contained in a liquid in ionized, molecular, or micro-granular suspended form. Key applications include:

Drinking Water & RO Filtration: Evaluating municipal tap water purity and reverse osmosis membrane rejection efficiency
Boiler & Cooling Water Systems: Preventing scale accumulation and mineral scaling by monitoring blowdown thresholds
Hydroponics & Agriculture: Managing nutrient solution concentration for optimal plant growth
Wastewater Effluent Screening: Compliance monitoring of dissolved mineral salts in industrial discharge

Qiwei Manufacturing & OEM Advantages

Supporting global electrochemical instrument distributors, system integrators, and brand owners:

Selectable Conversion Algorithms: Built-in conversion curves for NaCl, KCl, and customizable salt matrices
Advanced Temperature Compensation: Linear and non-linear ATC coefficients for precision across varying liquid temperatures
OEM & ODM Customization: Logo branding, custom housing colors, and localized language software UI
Internal Links: Combine with our Electrochemical Instruments, pH Meters, and Spectrophotometers for complete water analysis.

Frequently Asked Questions (TDS Meter Sourcing Guide)

Q1: How does a TDS meter calculate total dissolved solids?

TDS meters do not directly weigh solid matter. Instead, they measure the electrical conductivity (EC) of the water and apply an internal mathematical conversion factor (typically between 0.50 and 0.70) to estimate total dissolved solids in milligrams per liter (mg/L or ppm).

Q2: Can I adjust the TDS conversion factor on Qiwei meters?

Yes! Qiwei benchtop and portable TDS meters allow users to manually adjust the conversion factor (e.g., matching specific salt solutions or national testing standards) for maximum analytical accuracy.

Q3: Do you support OEM custom branding and wholesale distributor pricing?

Yes, as a factory-direct manufacturer, we offer complete OEM/ODM custom branding, customized UI interfaces, private label packaging, and tiered volume discounts for global laboratory suppliers.

Require Factory Direct Pricing or Custom TDS Testing Equipment?

Get in touch with Hangzhou Qiwei Instrument today for technical consultation, probe options, and competitive distributor pricing within 24 hours.

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Hangzhou Qiwei Instrument Co., Ltd. is one of the most reliable manufacturers and suppliers of tds meter in China, featured by quality products and good service. Please rest assured to buy bulk durable tds meter in stock here from our factory. We also accept customized orders.

Pocket TDS Tester, tds meter