{"product_id":"ionic-ph-buffer-4","title":"Ionic pH Buffer 4 Calibration Solution","description":"\u003ch2\u003eA pH meter is only as accurate as its last calibration\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIonic pH Buffer 4\u003c\/strong\u003e is a fixed-value solution held precisely at pH 4.00, made for calibrating pH meters, handheld pens, monitors and dosing controllers. Every electronic pH probe drifts over time as the sensing glass ages and picks up mineral deposits, and a probe that's drifted even slightly can push a whole feed schedule off course without ever throwing an obvious warning.\u003c\/p\u003e\u003cp\u003eCalibrating against a known, stable reference is the only way to know your meter is telling the truth. Pour a small amount into a clean container, follow your meter's calibration routine, and you have a trustworthy baseline again. Growth Technology recommend checking calibration monthly as routine maintenance, more often if a probe is used daily or has been dropped or left dry.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed pH 4.00\u003c\/strong\u003e reference solution for reliable calibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with any brand\u003c\/strong\u003e of pH pen, monitor or dosing controller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick to use\u003c\/strong\u003e — decant, calibrate, done\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeeps feed schedules accurate\u003c\/strong\u003e by catching probe drift early\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePairs with pH Buffer 7\u003c\/strong\u003e for a two-point calibration for extra accuracy\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFixed value: pH 4.00\u003c\/li\u003e\n\u003cli\u003eUse: calibration of pH meters, monitors and controllers\u003c\/li\u003e\n\u003cli\u003eRecommended frequency: monthly, or more often with daily use\u003c\/li\u003e\n\u003cli\u003eManufacturer: Growth Technology Ltd\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Growth Technology","offers":[{"title":"300ml","offer_id":53500726149386,"sku":"NUT-GRTE-002-01","price":3.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/Buffer-4_ff22ad19-9ce4-457f-a147-0c094fc54722.jpg?v=1786377699","url":"https:\/\/hydrocropshop.co.uk\/products\/ionic-ph-buffer-4","provider":"Hydro Crop Shop","version":"1.0","type":"link"}