White Digital TDS EC Water Quality Tester 3-in-1

Accurate 3‑in‑1 digital testing for clear insight into your water.

This white Digital Water Quality Tester combines TDS, EC and temperature measurement in one compact, pen-style device. With a TDS range of 0-9999 ppm and conductivity range of 0-9990 µS/cm, it delivers precise readings for a wide variety of water sources. The high-contrast LCD screen clearly displays results, while the durable ABS housing and pocket-sized design (154 × 30 × 14 mm) make it suitable for both home and professional use.

Designed for straightforward operation, this tester features one-button control, automatic temperature compensation (ATC) and an auto-off function after 5 minutes of inactivity to conserve battery life. It measures temperature from 0.1-80.0 °C (32.0-176.0 °F), allowing you to monitor both water quality and temperature in applications such as drinking water, aquariums, hydroponics, pools, spas and filtration systems. Mode memory ensures the device starts in the last-used mode for efficient, repeatable testing.

Why It's a Smart Choice

• 3 measurements in one device - Simultaneously covers TDS, electrical conductivity and temperature for a comprehensive view of water quality.
• Reliable, easy-to-read results - Digital LCD display with clear ppm, µS/cm and °C/°F readings, plus ±2% accuracy for consistent monitoring.
• Portable and efficient - Lightweight pen design, auto-off function and long battery life (CR2032, not included) support frequent on-site testing.

FAQ

Q: What can I use this tester for?
A: It is suitable for checking drinking water, aquarium water, hydroponic nutrient solutions, pools, spas, water filters and general laboratory or field testing.

Q: How do I switch between TDS, EC and temperature?
A: Use the SHIFT button to cycle through TDS and EC modes; double-press to toggle between Celsius and Fahrenheit temperature display.

Q: Does it compensate for water temperature automatically?
A: Yes. The automatic temperature compensation (ATC) function adjusts readings based on the current water temperature in measurement mode.

Q: Is calibration required?
A: The meter includes a built-in calibration function. For best accuracy, periodic calibration with appropriate standard solutions is recommended, especially for professional use.

Q: What battery does it use?
A: The tester is powered by one 3V CR2032 button cell (not included), which can support approximately 1000 hours of continuous operation.