Know Exactly What's in Your Water — in Seconds.

The TDS-3 Water Quality Tester Pen gives you instant, accurate readings of total dissolved solids so you can make informed decisions about the water you drink, cook with, and bathe in.

Why It Works:

• 💧 Instant TDS Readings – Accurate water purity results in seconds
• 🔬 Wide Measurement Range – Measures up to 9,990 ppm with ±1% accuracy
• 🧳 Compact & Portable – 152 × 30 × 15mm — fits in your pocket or travel kit
• 🔋 Long Battery Life – Powered by 2 × 1.5V batteries

Perfect For: Tap & filtered drinking water, swimming pools, aquariums, camping & travel