3-in-1 Digital TDS Water Quality Tester – Handheld Meter Pen

3-in-1 Digital Water Quality Tester – TDS, Temperature & Conductivity Meter

Wondering how pure your drinking water really is? This compact, handheld 3-in-1 Water Quality Monitor measures Total Dissolved Solids (TDS), electrical conductivity, and water temperature in seconds — giving you instant, accurate insight into your water's purity. Whether you're testing tap water, filtered water, aquarium water, or a home water softener system, this pocket-sized pen makes monitoring effortless.

Made in Mainland China.

Why You'll Love It

• 3-in-1 Measurement: Simultaneously reads TDS (0–9999 ppm), conductivity (0–9999 µS/cm), and temperature (0°C–99°C / 32°F–212°F) — all in one slim pen.
• Ultra-Lightweight (70g): Third-generation upgraded design — the lightest portable TDS instrument in its class. Slips easily into a pocket or bag.
• 5-Second Readings: Delicate bare sensing elements deliver fast, stable results. Just dip the tip and read.
• Automatic Temperature Compensation (ATC): Automatically normalizes readings to the standard 25°C value, ensuring accuracy regardless of water temperature.
• Long Battery Life: High-capacity DC 3V (230mAh) button battery — designed to last over 5 years of regular use.
• Auto Shut-Off: Conserves battery automatically when not in use.
• Smart Design: The pen tip fits directly into standard drinking bottle mouths; the pen cap doubles as a small liquid container for testing — no separate cup needed.
• Easy to Clean: Removable cap for quick probe cleaning after each use.
• High Accuracy: ±2% measurement accuracy for reliable, consistent results.

Product Specifications

What's in the Box

• 1× 3-in-1 Water Quality Tester Pen

Precautions

• Do not submerge the entire instrument in water — dip only the probe tip.
• Keep away from high heat and direct sunlight when storing.
• Avoid dropping or applying heavy pressure to the device.

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Frequently Asked Questions

Q: What does this 3-in-1 water tester actually measure?

A: This digital water quality pen measures three key parameters simultaneously: Total Dissolved Solids (TDS) in ppm (0–9999 ppm), electrical conductivity in µS/cm (0–9999 µS/cm), and water temperature in Celsius or Fahrenheit (0°C–99°C). Together, these readings give you a comprehensive picture of your water's purity and mineral content.

Q: Is this TDS meter suitable for testing home drinking water and aquariums?

A: Yes! This handheld TDS meter is ideal for testing tap water, filtered/purified water, bottled water, aquariums, hydroponics systems, swimming pools, and home water softener output. The lower the TDS reading, the lower the concentration of dissolved minerals and salts — making it easy to assess whether your filter or softener is working effectively.

Q: Does the battery come included?

A: Yes, the DC 3V 230mAh button cell battery is included. Thanks to the high-capacity battery and the automatic shut-off feature, the battery is engineered to last over 5 years under regular use.

Q: How do I use this water quality pen?

A: Simply remove the cap, dip the probe tip into the water sample (do not fully submerge the pen), and wait approximately 5 seconds for a stable reading to appear on the digital display. The automatic temperature compensation feature will adjust the reading to the 25°C standard for accurate results. Rinse and dry the probe after each use.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.