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* TDS water quality test pen, wide measurement range of 0–9990 ppm, high accuracy of ±2%, corrosion-resistant alloy probe, results in seconds; suitable for water quality testing in various scenarios such as drinking water, swimming pools, aquaculture and agriculture. CE/RoHS certified, quality assured.*
Product Overview
Is the water you drink really clean?
The water you consume every day contains minerals, salts and various total dissolved solids (TDS) that are invisible to the naked eye. Tap water, bottled water, water from water purifiers—just how pure are they? You cannot tell by looking at them.
The TDS-H1A water quality tester is the pen that helps you ‘see’ the truth in your water.
Simply immerse the alloy probe in the water to get a reading in seconds, accurately indicating the current TDS level of the water. With a wide measurement range of 0–9,990 ppm, it provides accurate readings for everything from ultrapure water to hard water. Featuring a specially developed nano-level smart chip combined with multi-stage calibration algorithms, it achieves a measurement accuracy of ±2% F.S., offering fast testing, a sensitive response and more accurate readings.
Key Points
🔬 Specially developed nano-level smart chip with upgraded algorithms for greater precision
Equipped with Hanlai’s specially developed nano-level chip, it can detect minute fluctuations in current and instantly and accurately calculate the current value. Enhanced by multi-stage calibration algorithms, every test is precise and reliable.
🛡️ Corrosion-resistant alloy probe for responsive and durable performance
Featuring an alloy electrode probe, it offers fast detection, responsive performance and more accurate conductivity readings. Made from corrosion- and rust-resistant materials, it maintains precision even with long-term use.
📱 Instant readings with automatic data lock
Measurements begin immediately upon switch-on, with TDS values displayed within seconds. Simply press the HOLD button to lock the current reading, eliminating the need to keep the device submerged whilst monitoring—making it convenient for reading and recording.
🔋 Low-power design with a sealed, removable battery compartment
Powered by two 1.5V LR44 button cells, with an operating current of ≤2mA, ensuring long battery life. The sealed, removable battery compartment design makes replacement easy and provides added peace of mind regarding water resistance.
✈️ Compact size, perfect for carrying with you
Measuring just 140 × 24 × 14.5 mm and weighing only 30 g, it is as light as a pen. Carry it with you and take measurements wherever you go.
Technical Specifications
Parameter Specification
Product Model TDS-H1A
Measuring Range 0–9990 ppm
Measuring Accuracy ±2% F.S.
Operating Temperature 0°C – 60°C
Operating Current ≤2 mA
Battery Specifications 1.5V × 2 (LR44 button cells)
Net Weight 30g
Dimensions 140 × 24 × 14.5mm
Probe Material Corrosion-resistant alloy probe
Applications Water treatment industry, various types of domestic water
Usage Scenarios
Test before drinking for greater peace of mind
The Hanlai TDS-H1A meets water quality testing needs across a range of scenarios:
Daily drinking water: Test your tap water, bottled water and water from your water purifier to confirm its purity before drinking
Water purifier performance monitoring: Regularly monitor changes in TDS values of inlet and outlet water to determine whether the filter cartridge needs replacing
Swimming pool water management: Quickly spot-check the total dissolved solids content of pool water
Aquaculture water monitoring: Keep a close eye on water quality parameters for fish and prawn farming
Agricultural water testing: Ensuring the quality of irrigation water
Water for brewing: Whether brewing tea, making coffee or cooking rice, good water brings out the best flavour
TDS Value Reference Range
A quick guide to understanding your water quality
TDS Value (ppm) Water Quality Grade Notes
0–20 ✅ High purity Ideal drinking water; safe to drink straight from the tap
21–50 ✅ Moderate purity Healthy drinking water; boiling is recommended
51–100 ⚠️ Mineral water Suitable for direct consumption after professional treatment
101–200 ⚠️ Hard water Requires softening before use
201–400 ⚠️ Prone to limescale Barely acceptable for everyday use
401–500 ❌ Poor quality Unpleasant taste; not recommended for use
500 and above ❌ High levels of contaminants Harmful to health; requires treatment
Note: The above is based on international standards for direct drinking water. The lower the TDS value, the fewer dissolved solid impurities in the water and the purer the water quality.
