Accurate & Reliable Water Quality Testing

The HM Digital TDS-4 TDS Meter is a compact, handheld device designed to measure Total Dissolved Solids (TDS) in water quickly and accurately. Ideal for hydroponics, aquariums, drinking water, water filtration systems, and more, this easy-to-use meter delivers fast digital readings to help you monitor water quality with confidence.

Key Features

• ✔️ Measures Total Dissolved Solids (TDS) in ppm (mg/L)
• ✔️ Measurement range: 0–9,990 ppm
• ✔️ Automatic Temperature Compensation (ATC)
• ✔️ Factory calibrated for immediate use
• ✔️ Hold function for easy reading
• ✔️ Auto-off function to preserve battery life
• ✔️ Large, easy-to-read LCD display
• ✔️ Includes protective carrying case

Why Choose the TDS-4?

The TDS-4 offers reliable performance at an affordable price point. Whether you're checking the effectiveness of a reverse osmosis system, maintaining optimal nutrient levels in hydroponics, or testing tap water quality, this meter provides consistent and dependable results.

Specifications

• Model: TDS-4
• Range: 0–9,990 ppm
• Resolution:
• 1 ppm (0–999 ppm)
• 10 ppm (1,000–9,990 ppm)
• Accuracy: ±2%
• ATC Range: 1–50°C
• Battery: 2 x 1.5V button cell batteries (included)

What’s Included

• HM Digital TDS-4 Meter
• Protective carrying case
• User manual
• Batteries (installed)