{"product_id":"bluelab-ph-4-0-solution-sachets","title":"Bluelab pH 4.0 Solution Sachets – For pH Meter Calibration","description":"\u003ch2\u003eA Reliable pH 4.0 Reference, Ready Whenever You Calibrate\u003c\/h2\u003e\u003cp\u003eBluelab pH 4.0 Solution Sachets deliver a fresh dose of \u003cstrong\u003epH 4.0 calibration buffer\u003c\/strong\u003e in a single tear-open pouch, so a two-point calibration never depends on how fresh the container on the shelf still is. Each box holds \u003cstrong\u003e30 single-use 18ml sachets\u003c\/strong\u003e, giving a pH pen, probe or controller an accurate low-end reference every time.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e30 single-use 18ml sachets\u003c\/strong\u003e of genuine Bluelab pH 4.0 calibration buffer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTear-open format\u003c\/strong\u003e removes the risk of a stale or contaminated calibration container\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompletes a two-point calibration\u003c\/strong\u003e alongside a pH 7.0 reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with any pH meter, pen or controller probe\u003c\/strong\u003e using a standard buffer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to carry\u003c\/strong\u003e for calibrating away from the main grow room\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent, lab-accurate pH 4.0 value\u003c\/strong\u003e every time you calibrate\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eA Meter That Reads Confidently Wrong\u003c\/h3\u003e\u003cp\u003eA pH meter drifts gradually, and because it still returns a plausible-looking number, the drift usually goes unnoticed until a feed has been running at the wrong pH for days. Two-point calibration against known references is what catches that early, and it only works if the reference solution itself is fresh - an old, evaporated or contaminated buffer just moves the error somewhere else.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTear open one sachet\u003c\/strong\u003e and pour the full 18ml into a clean calibration cup\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrate at pH 7.0 first\u003c\/strong\u003e, then rinse the probe and calibrate at pH 4.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse a fresh sachet for every calibration\u003c\/strong\u003e - do not reseal a part-used pouch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRinse the probe with clean water\u003c\/strong\u003e between the two calibration points\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStore the box\u003c\/strong\u003e in a cool, dry place out of direct sunlight\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv class=\"hcs-specs\"\u003e\u003cul\u003e\n\u003cli\u003eContents: 30 sachets\u003c\/li\u003e\n\u003cli\u003eVolume per sachet: 18ml\u003c\/li\u003e\n\u003cli\u003eSolution: pH 4.0 calibration buffer\u003c\/li\u003e\n\u003cli\u003eFormat: single-use, tear-open pouch\u003c\/li\u003e\n\u003cli\u003eUse: calibrating pH meters, pens, probes and controllers\u003c\/li\u003e\n\u003cli\u003eBrand: Bluelab\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":53798861930762,"sku":"NUT-BLUE-006-01","price":39.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-ph-4-0-solution-sachets-default-title-1.png?v=1790169273","url":"https:\/\/hydrocropshop.co.uk\/products\/bluelab-ph-4-0-solution-sachets","provider":"Hydro Crop Shop","version":"1.0","type":"link"}