Product Overview

Know exactly what is in your water in seconds. This pocket-sized digital TDS (Total Dissolved Solids) meter measures the concentration of dissolved minerals, salts and metals in your drinking water and instantly displays the result on a clear LCD screen. A lower TDS reading generally means purer water, making this pen an essential tool for testing tap water, RO/filtered water, aquariums, swimming pools, hydroponics and more.

Built with a titanium-alloy probe and Automatic Temperature Compensation (ATC), it delivers fast, stable and reliable readings every time. The one-touch HOLD function freezes your reading for easy viewing, while auto power-off preserves battery life. Whether you are checking the performance of your water filter or monitoring water for plants and fish, this tester gives you accurate answers in a single dip.

Key Features

Wide Measuring Range Reads from 0 to 9990 ppm, covering everything from ultra-pure RO water to hard tap water.	High Accuracy ±2% Precision electrode delivers dependable, repeatable results for confident testing.
Automatic Temp. Compensation Built-in ATC sensor adjusts readings for water temperature so results stay stable.	HOLD & Auto Power-Off Lock a reading with one button; the pen switches off automatically to save battery.
Clear LCD Display Large, easy-to-read digital screen shows results at a glance, even indoors.	Portable & Lightweight Slim pen design with protective cap fits in your pocket, bag or drawer.

Specifications

Attribute	Details
Product Type	Digital TDS Meter / Water Quality Test Pen
Measuring Range	0 – 9990 ppm
Resolution	1 ppm (0–999 ppm); 10 ppm with ×10 indicator (1000–9990 ppm)
Accuracy	±2% (full scale)
Temperature Compensation	Automatic (ATC), approx. 10–50°C
Operating Temperature	0.1 – 80°C (32 – 176°F)
Display	Digital LCD screen
Functions	TDS measurement, HOLD (data lock), Auto power-off
Probe / Body Material	Titanium-alloy electrode with ABS plastic housing
Power Supply	2 × 1.5V LR44 button batteries (included)
Auto Power-Off	After approx. 10 minutes of inactivity
Approx. Size	15.5 × 3.1 × 2.3 cm
Approx. Weight	~57 g (with batteries)

Where to Use It

● Drinking & Tap Water	● RO & Filtered Water	● Aquariums & Fish Tanks
● Swimming Pools & Spas	● Hydroponics & Gardening	● Water Filter Testing

How to Use

1.  Remove the protective cap and press the power button to switch on. 2.  Dip the probe into the water sample (do not exceed the maximum immersion line). 3.  Gently stir to remove air bubbles and wait for the reading to stabilise. 4.  Press HOLD to lock the reading, then note the ppm value. 5.  Rinse the probe with clean water, dry it and replace the cap after use.

Package Includes

1 × Digital TDS Meter (Water Quality Test Pen)  •  2 × LR44 Button Batteries (pre-installed)  •  Protective Cap

Please Note: A TDS meter measures the total dissolved solids in water, not bacteria or specific chemical contaminants. Readings may vary slightly (±2%) with water temperature and battery level. Colours and dimensions are approximate and may differ slightly from images due to manufacturing batches.