Extech EC701 Water Quality Meter for Conductivity, TDS, Salinity, and Temperature

Monitoring water quality across multiple parameters can be cumbersome with separate instruments, but the Extech EC701 consolidates conductivity, TDS, salinity, and temperature measurements into one portable, waterproof device. Its flat-surface electrode is replaceable and easy to clean, making it suitable for field and lab use.

Who is it for

This meter is ideal for environmental technicians, aquarium hobbyists, hydroponic growers, and water treatment professionals who need reliable, on-the-spot water analysis without carrying multiple tools.

Main features

• Measures conductivity, TDS, salinity, and temperature with automatic temperature compensation
• Auto-ranging conductivity from 0 to 19.99 mS/cm with ±2% full scale accuracy
• IP67 waterproof housing and replaceable flat surface electrode for easy maintenance
• Automatic 1, 2, or 3 point calibration and adjustable temperature coefficient
• Large LCD with bargraph, data hold, and auto power off after 10 minutes

Specifications

• Conductivity range: 0 to 19.99 mS/cm (auto-ranging); resolution: 0.1 µS/cm, 1 µS/cm, 0.01 mS/cm; accuracy: ±2% full scale
• TDS range: 0 to 9.99 ppt (auto-ranging); resolution: 0.1 ppm, 1 ppm, 0.01 ppt
• Salinity range: 0 to 9.99 ppt (auto-ranging); resolution: 0.1 ppm, 1 ppm, 0.01 ppt
• Temperature range: -5 to 90°C (23 to 194°F); accuracy: ±1°C (±1.8°F)
• Automatic temperature compensation: 0 to 60°C (32 to 140°F); adjustable coefficient 0 to 4.0% per °C
• Waterproof rating: IP67
• Calibration: automatic 1, 2, or 3 point
• Electrode: replaceable flat surface
• Power supply: 4 x CR2032 button batteries
• Display: large LCD with bargraph
• Data hold: yes; auto power off: yes (after 10 minutes)

Tips

Rinse the electrode with distilled water after each use and store it dry to extend its life. Replace the flat electrode when readings become unstable even after calibration.