Water TDS & EC Test Pen

The TDS/EC Test Pen: Your Ultimate Companion for Hydroponic Farming

Before you plant, ensure your nutrient solution meets the mark.

Product Name: TDS & EC Test Pen

• Product Size: 154*30*14mm
• Accuracy: ±2%
• Product Weight: 55g 
• TDS Measurement Range: 0-9990 ppm
• EC Measurement Range: 0-9990 μs/cm
• Temperature Measurement Range: 0.1-80°C
• Measurement Items: TDS, EC, Temperature

EC Value Reference

• For melons and fruits: 2000 μs/cm
• For vegetables: 1600 μs/cm
• For pure water: 0.055 μs/cm
• For distilled water: 0.5 μs/cm
• For drinking water: 1055 μs/cm

Detectable Types of Impurities in Water
Ca: Calcium, soluble salts, calcium ions, magnesium ions, etc.
Ionic: Ionic organic compounds, ammonium acetate, sodium sulfate, etc.
Heavy Metal Ions: Chromium, zinc, aluminum, copper, etc.

Usually, the lower the TDS value, the fewer soluble salts such as heavy metal ions in the water, indicating purer water. We cannot intuitively understand the purity of water. Even seemingly clear and transparent water may contain many impurities.

TDS Value Reference

• Ideal Drinking Water: 0-20
• Acceptable Tap Water: 20-50, 50-100
• Relatively Poor Quality: 100-200, 200-400
• Poor Quality: 500 and above