Digital TDS Water Hardness Tester Pen
Ensure your water is safe and pure with the Digital TDS Water Hardness Tester Pen. This easy-to-use device accurately measures total dissolved solids (TDS) in water, providing fast results to assess water quality. With a wide 0-9999ppm range, one-button operation, and lightweight design, it’s perfect for home, travel, and professional use. Ideal for drinking water, aquariums, RO/DI systems, and more, it helps you take control of water purity effortlessly. Built with a mercury-free, eco-friendly battery for long-lasting performance and environmental safety.
Key Features:
- Accurate Water Testing: Measures TDS levels from 0-9999ppm with precision.
- Simple to Use: One-button operation and easy-to-follow guidelines.
- Lightweight & Portable: Weighs only 26g—ideal for travel and on-the-go testing.
- Eco-Friendly Design: Low-power dissipation and mercury-free battery.
- Versatile Applications: Suitable for drinking water, RO/DI systems, aquariums, swimming pools, and more.
- Temperature Range: Operates effectively between 0-80°C.
Instructions:
Step 1: Power On: Power on the device using the button.
Step 2: Put It Into the Water: Submerge it at a 45° angle to avoid bubbles.
Step 3: Wait for 3 Seconds: Wait 3 seconds for stable readings.

Step 4: Read & Store: Read the ppm value, power it off, dry the device, and store it safely.

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