{"product_id":"gvda-gd631a-ph-meter","title":"GVDA GD631A PH meter","description":"\u003ch2\u003eGVDA GD631A pH Meter – Digital Water Quality Tester with ATC \u0026amp; Backlit LCD\u003c\/h2\u003e\n\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1) \u003cstrong\u003eWide pH Measurement Range\u003c\/strong\u003e – 0.0–14.0 pH, 0.1 pH resolution, ±0.2 pH accuracy\u003c\/li\u003e\n  \u003cli\u003e2) \u003cstrong\u003eAutomatic Temperature Compensation (ATC)\u003c\/strong\u003e – Accurate readings across varying temperatures (5-50°C)\u003c\/li\u003e\n  \u003cli\u003e3) \u003cstrong\u003e3-Point Calibration\u003c\/strong\u003e – Calibrate with pH 4.0, 6.86, and 9.18 buffer solutions\u003c\/li\u003e\n  \u003cli\u003e4) \u003cstrong\u003eBacklit LCD Display\u003c\/strong\u003e – Clear readings in low-light conditions\u003c\/li\u003e\n  \u003cli\u003e5) \u003cstrong\u003eData Hold Function\u003c\/strong\u003e – Freeze current reading on display\u003c\/li\u003e\n  \u003cli\u003e6) \u003cstrong\u003e°C\/°F Switchable\u003c\/strong\u003e – Select preferred temperature unit\u003c\/li\u003e\n  \u003cli\u003e7) \u003cstrong\u003eAuto Power Off\u003c\/strong\u003e – Preserves battery life when not in use\u003c\/li\u003e\n  \u003cli\u003e8) \u003cstrong\u003eLow Battery Indication\u003c\/strong\u003e – Alerts when battery replacement is needed\u003c\/li\u003e\n  \u003cli\u003e9) \u003cstrong\u003eIP55 Ingress Protection\u003c\/strong\u003e – Resistant to dust and water splashes\u003c\/li\u003e\n  \u003cli\u003e10) \u003cstrong\u003ePortable \u0026amp; Lightweight\u003c\/strong\u003e – Compact design (185×36×18mm), only 82g\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eModel\u003c\/td\u003e\n      \u003ctd\u003eGD631A\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003epH Range\u003c\/td\u003e\n      \u003ctd\u003e0.0 – 14.0 pH\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003epH Resolution\u003c\/td\u003e\n      \u003ctd\u003e0.1 pH\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003epH Accuracy\u003c\/td\u003e\n      \u003ctd\u003e±0.2 pH\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTemperature Range\u003c\/td\u003e\n      \u003ctd\u003e5°C – 50.0°C (41°F – 122°F)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTemperature Resolution\u003c\/td\u003e\n      \u003ctd\u003e0.1°C\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTemperature Accuracy\u003c\/td\u003e\n      \u003ctd\u003e±1.0°C\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAutomatic Temperature Compensation (ATC)\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCalibration Points\u003c\/td\u003e\n      \u003ctd\u003epH 4.0, 6.86, 9.18 (3-point)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDisplay\u003c\/td\u003e\n      \u003ctd\u003eLCD with backlight\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e°C\/°F Switchable\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eData Hold\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLow Battery Indication\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eAuto Power Off\u003c\/td\u003e\n      \u003ctd\u003eYes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eIngress Protection\u003c\/td\u003e\n      \u003ctd\u003eIP55\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePower Supply\u003c\/td\u003e\n      \u003ctd\u003e2 × 1.5V AAA batteries (not included)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eWeight\u003c\/td\u003e\n      \u003ctd\u003e≈82g\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDimensions\u003c\/td\u003e\n      \u003ctd\u003e185 × 36 × 18 mm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSafety Rating\u003c\/td\u003e\n      \u003ctd\u003eEN61326-1\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhere It Can Be Used:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrinking water testing\u003c\/strong\u003e – ensure tap or filtered water quality\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAquariums \u0026amp; fish tanks\u003c\/strong\u003e – maintain optimal pH for aquatic life\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwimming pools \u0026amp; spas\u003c\/strong\u003e – monitor water balance and safety\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHydroponics \u0026amp; gardening\u003c\/strong\u003e – check nutrient solution pH for plant health\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLaboratories \u0026amp; education\u003c\/strong\u003e – conduct accurate pH measurements in experiments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFood \u0026amp; beverage\u003c\/strong\u003e – test pH of liquids and semi-liquids\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Use:\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eRemove the protective cap and rinse the electrode with distilled water\u003c\/li\u003e\n  \u003cli\u003eInsert 2 × AAA batteries (not included)\u003c\/li\u003e\n  \u003cli\u003ePress the power button to turn on the meter\u003c\/li\u003e\n  \u003cli\u003eImmerse the electrode into the test solution (up to the recommended depth)\u003c\/li\u003e\n  \u003cli\u003eWait for the reading to stabilize (display shows stable value)\u003c\/li\u003e\n  \u003cli\u003ePress HOLD to freeze the reading if needed\u003c\/li\u003e\n  \u003cli\u003eRinse the electrode with distilled water after each use and replace the cap\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eCalibration (3-Point):\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCalibrate regularly using pH 4.0, 6.86, and 9.18 buffer solutions\u003c\/li\u003e\n  \u003cli\u003eFollow the manual for step-by-step calibration procedure\u003c\/li\u003e\n  \u003cli\u003eCalibration ensures accurate readings over the full pH range\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Includes:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × GVDA GD631A pH Meter\u003c\/li\u003e\n  \u003cli\u003e1 × User Manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: 2 × AAA batteries and pH calibration buffer solutions are not included.\u003c\/em\u003e\u003c\/p\u003e","brand":"GVDA","offers":[{"title":"Default Title","offer_id":56102807765377,"sku":"GVDA-PHM-GD631A","price":18.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/3486\/1290\/files\/gvda-gd631a-ph-meter-ph-meter-gvda-2790411.jpg?v=1787823155","url":"https:\/\/ampanova.shop\/products\/gvda-gd631a-ph-meter","provider":"AMPANOVA","version":"1.0","type":"link"}