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Digital TDS Meter

The Digital Pocket TDS Meter by HM Digital allows quick and reliable testing of water quality by measuring Total Dissolved Solids (TDS). It provides instant readings to help monitor filtration performance and ensure safe drinking water.

This compact handheld device is widely used for household water testing, RO system monitoring, aquaculture, laboratories, and commercial water treatment applications.

Features

Measurement range: 0 – 9990 ppm TDS
High accuracy microprocessor technology for reliable readings
Hold function allows easy reading and recording of results
Auto shut-off after 10 minutes to conserve battery life
Built-in digital thermometer with large LCD display
Automatic Temperature Compensation (ATC) for accurate readings
Pocket-size portable design with carrying case and belt clip
User recalibration capability using a mini screwdriver

What the system is and what problem it solves?

The Digital TDS Meter measures the total dissolved solids present in water, helping users quickly determine water purity and filtration performance.

High TDS levels may indicate the presence of minerals, salts, metals, or contaminants in water. Monitoring TDS helps identify filtration issues, verify RO system efficiency, and ensure water quality meets required standards.

Process Design & Operating Principle

The device uses a microprocessor-controlled conductivity sensor to measure electrical conductivity in water. The conductivity value is then converted into TDS concentration (ppm) and displayed instantly on the LCD screen.

Automatic temperature compensation adjusts readings based on water temperature to maintain measurement accuracy under varying conditions.

Specifications

Parameter	Specification
Measurement Range	0 – 9990 ppm
Resolution	1 ppm (0-999) / 10 ppm (1000-9990)
Accuracy	±1%
Temperature Measurement	Built-in digital thermometer
Display	Large LCD screen
Power Supply	AAA batteries
Auto Shut Off	After 10 minutes
Calibration	Factory calibrated (342 ppm NaCl)

Models

Applications

Reverse osmosis system monitoring
Drinking water quality testing
Aquaculture and fish farming
Industrial water treatment systems
Laboratory water testing
Food and beverage processing facilities
Household water filtration verification

Ideal For

Homeowners checking drinking water quality
RO system performance monitoring
Water treatment technicians
Laboratories and testing facilities
Aquaculture farms and fisheries
Food and beverage production environments

System Components

Certified Parts. Proven Performance.

We use certified components sourced from trusted global manufacturers to ensure system durability, operational stability, and regulatory compliance. From membranes and pumps to control panels and filtration media, every part is selected to support long-term performance and ease of maintenance.