3-in-1 Water Quality Tester – TDS, pH & Temp Meter Pen

3-in-1 Water Quality Test Pen – TDS, pH & Temperature Meter

Take the guesswork out of water quality with this versatile 3-in-1 Water Quality Test Pen. Measuring TDS (Total Dissolved Solids), pH, and Temperature all in one compact device, this multi-parameter tester is perfect for home drinking water, hydroponics, aquariums, swimming pools, fish tanks, ponds, and even saltwater or ocean testing. Whether you're a hobbyist or a professional, this easy-to-use meter gives you fast, accurate readings at the touch of a button.

FDA Disclaimer: This product is not intended to diagnose, treat, cure, or prevent any disease. It is a general-purpose water quality testing tool and is not a medical device.

Key Features

• Wide Application: Test household drinking water, hydroponics systems, swimming pools, aquariums, fish tanks, ponds, koi ponds, and saltwater/seawater environments with ease.
• Easy LCD Display: Clear backlit LCD screen makes readings simple to view — even for first-time users. Includes both backlit and non-backlit pen versions.
• High-Precision Readings: Advanced algorithm chip and precision electrodes deliver accurate, fast responses so you can trust your results every time.
• Simple to Use & Calibrate: Just dip the electrode tip into the water, wait a few seconds, and get instant results. No complicated setup required.
• Perfect for Hydroponics & Aquariums: Optimize plant growth, maintain aquatic life health, and ensure ecological balance in your fish tanks and hydroponic gardens.
• Compact & Portable: Pen-shaped design fits easily in a pocket, making it ideal for field testing, labs, and everyday home use.
• Made in Mainland China.

Specifications

• Parameters Measured: TDS, pH, Temperature
• Display: LCD (backlit model included)
• Material: Plastic
• USB: No
• Electric: No (battery-powered)

What's in the Box

• 2 x Water Quality Test Pen (1 backlit + 1 non-backlit)

Note: Due to lighting and display differences, the color of the item may vary slightly from the photos. Measurement allowed error is ±1–3cm.

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Learn More About Water Quality

Understanding water quality is essential for health and safety. Learn more from the U.S. Environmental Protection Agency (EPA) – Learn About Water and explore resources from the CDC – Healthy Water: Drinking Water.

Frequently Asked Questions

Q: What does this 3-in-1 water quality test pen measure?

A: This multi-parameter water quality tester measures three key parameters: TDS (Total Dissolved Solids), which indicates dissolved impurities; pH, which measures acidity or alkalinity; and Temperature. Together, these readings give you a comprehensive snapshot of your water quality.

Q: Is this water quality meter suitable for aquariums and hydroponics?

A: Yes! This pH and TDS meter is specifically designed for a wide range of applications including aquariums, fish tanks, koi ponds, hydroponic gardens, swimming pools, and household drinking water. It helps you maintain the ideal water conditions for aquatic life and plant growth.

Q: How do I use the water quality test pen?

A: Using it is simple — just remove the cap, dip the electrode tip into your water sample, and wait a few seconds. The LCD display will show your TDS, pH, and temperature readings. No advanced technical knowledge is needed.

Q: Does the package include more than one tester pen?

A: Yes! The package includes 2 water quality test pens — one with a backlit LCD display and one without. This gives you a great backup or lets you share with a partner or colleague.

Q: Can this pen test saltwater or seawater?

A: Absolutely. This tester is capable of detecting salinity levels in seawater, ocean water, and saltwater fish pond environments, making it a versatile tool for marine hobbyists and professionals alike.