GVDA GD631A PH meter

GVDA GD631A pH Meter – Digital Water Quality Tester with ATC & Backlit LCD

The GVDA GD631A is a reliable digital pH meter designed for testing water quality in drinking water, aquariums, swimming pools, hydroponics, and laboratory applications. Featuring automatic temperature compensation (ATC), 3-point calibration, and a backlit LCD display, this portable tester delivers accurate pH measurements from 0.0 to 14.0 pH with 0.1 pH resolution. Powered by 2 × AAA batteries, it is ideal for home, field, and educational use.

Key Features:

• 1) Wide pH Measurement Range – 0.0–14.0 pH, 0.1 pH resolution, ±0.2 pH accuracy
• 2) Automatic Temperature Compensation (ATC) – Accurate readings across varying temperatures (5-50°C)
• 3) 3-Point Calibration – Calibrate with pH 4.0, 6.86, and 9.18 buffer solutions
• 4) Backlit LCD Display – Clear readings in low-light conditions
• 5) Data Hold Function – Freeze current reading on display
• 6) °C/°F Switchable – Select preferred temperature unit
• 7) Auto Power Off – Preserves battery life when not in use
• 8) Low Battery Indication – Alerts when battery replacement is needed
• 9) IP55 Ingress Protection – Resistant to dust and water splashes
• 10) Portable & Lightweight – Compact design (185×36×18mm), only 82g

Specifications:

Where It Can Be Used:

• Drinking water testing – ensure tap or filtered water quality
• Aquariums & fish tanks – maintain optimal pH for aquatic life
• Swimming pools & spas – monitor water balance and safety
• Hydroponics & gardening – check nutrient solution pH for plant health
• Laboratories & education – conduct accurate pH measurements in experiments
• Food & beverage – test pH of liquids and semi-liquids

How to Use:

1. Remove the protective cap and rinse the electrode with distilled water
2. Insert 2 × AAA batteries (not included)
3. Press the power button to turn on the meter
4. Immerse the electrode into the test solution (up to the recommended depth)
5. Wait for the reading to stabilize (display shows stable value)
6. Press HOLD to freeze the reading if needed
7. Rinse the electrode with distilled water after each use and replace the cap

Calibration (3-Point):

• Calibrate regularly using pH 4.0, 6.86, and 9.18 buffer solutions
• Follow the manual for step-by-step calibration procedure
• Calibration ensures accurate readings over the full pH range

Package Includes:

• 1 × GVDA GD631A pH Meter
• 1 × User Manual

Note: 2 × AAA batteries and pH calibration buffer solutions are not included.