{"product_id":"ph-meter-calibration-buffer-solution-ph-4-7-10-orp-222mv","title":"pH Calibration Buffer Solution Set pH 4\/7\/10 \u0026 ORP 222mV","description":"\u003cp\u003eKeep your pH and ORP meters reading with precision using this \u003cstrong\u003epH Meter Standard Calibration Buffer Solution Set\u003c\/strong\u003e. Whether you're calibrating a digital pH tester for aquariums, hydroponics, water testing, or soil monitoring, this convenient 50ml calibration solution kit delivers repeatable, accurate results every time.\u003c\/p\u003e\n\n\u003cp\u003eEach set includes standard reference solutions for \u003cstrong\u003epH 4.00, pH 7.00, and pH 10.01\u003c\/strong\u003e, plus an \u003cstrong\u003eORP 222mV reference solution\u003c\/strong\u003e — covering the full range of calibration needs for most consumer and professional pH\/ORP meters. Compact at just \u003cstrong\u003e6.6 × 4 × 4 cm (2.59 × 1.57 × 1.57 in)\u003c\/strong\u003e, these bottles are easy to store in your testing kit or lab drawer. Available in \u003cstrong\u003e4 color-coded options\u003c\/strong\u003e to help you quickly identify each buffer value at a glance.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Point Calibration:\u003c\/strong\u003e Supports pH 4.00, 7.00, and 10.01 buffer points for accurate span and offset calibration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eORP Reference Solution:\u003c\/strong\u003e 222mV standard for reliable oxidation-reduction potential meter calibration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Portable:\u003c\/strong\u003e Small 50ml bottles fit neatly in any testing kit or storage drawer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor-Coded Options:\u003c\/strong\u003e Choose from 4 color variants for easy identification\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Works with most digital pH meters and ORP testers on the market\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEveryday Value:\u003c\/strong\u003e Reliable, consistent reference solutions at an accessible price point\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAquarium and fish tank water quality monitoring\u003c\/li\u003e\n  \u003cli\u003eHydroponic and soil nutrient testing\u003c\/li\u003e\n  \u003cli\u003eDrinking water and pool\/spa water testing\u003c\/li\u003e\n  \u003cli\u003eLaboratory and classroom science use\u003c\/li\u003e\n  \u003cli\u003eHome brewing and fermentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBuffer Values\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003epH 4.00 | pH 7.00 | pH 10.01 | ORP 222mV\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVolume\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50ml per bottle\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.6 × 4 × 4 cm \/ 2.59 × 1.57 × 1.57 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 available\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible With\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMost digital pH meters and ORP testers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eFor guidance on water quality testing standards and best practices, visit the \u003ca href=\"https:\/\/www.epa.gov\/ground-water-and-drinking-water\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eU.S. Environmental Protection Agency – Ground Water and Drinking Water\u003c\/a\u003e resource.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What pH calibration buffer solutions are included in this set?\u003c\/h4\u003e\n\u003cp\u003eA: This calibration solution set covers the three most widely used pH reference points — pH 4.00, pH 7.00, and pH 10.01 — plus an ORP 222mV standard solution, making it suitable for multi-point calibration of digital pH and ORP meters.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I use pH calibration buffer solution to calibrate my meter?\u003c\/h4\u003e\n\u003cp\u003eA: Rinse your pH meter's electrode with distilled water, then immerse it in the appropriate buffer solution (e.g. pH 7.00 first). Adjust your meter to match the reference value, rinse again, and repeat with the second buffer point for a two- or three-point calibration. Always follow the specific instructions for your meter model.\u003c\/p\u003e\n\u003ch4\u003eQ: Are these calibration solutions compatible with all pH meters?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — these standard buffer solutions are compatible with the vast majority of consumer and professional digital pH meters and ORP testers available on the market, as they conform to internationally recognized pH reference values (pH 4.00, 7.00, 10.01) and ORP standard (222mV).\u003c\/p\u003e\n\u003ch4\u003eQ: How should I store these calibration buffer solutions?\u003c\/h4\u003e\n\u003cp\u003eA: Store the bottles in a cool, dry location away from direct sunlight and extreme temperatures. Keep caps tightly sealed when not in use to prevent evaporation or contamination, which could affect accuracy.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What pH calibration buffer solutions are included in this set?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This calibration solution set covers the three most widely used pH reference points — pH 4.00, pH 7.00, and pH 10.01 — plus an ORP 222mV standard solution, making it suitable for multi-point calibration of digital pH and ORP meters.\"}}, {\"@type\": \"Question\", \"name\": \"How do I use pH calibration buffer solution to calibrate my meter?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Rinse your pH meter's electrode with distilled water, then immerse it in the appropriate buffer solution (e.g. pH 7.00 first). 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Keep caps tightly sealed when not in use to prevent evaporation or contamination, which could affect accuracy.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Garden \u0026 Outdoor\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/collections\/garden-outdoor\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"pH Calibration Buffer Solution Set pH 4\/7\/10 \u0026 ORP 222mV\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/products\/ph-meter-calibration-buffer-solution-ph-4-7-10-orp-222mv\"}]}\u003c\/script\u003e","brand":"Qme","offers":[{"title":"A4","offer_id":49709272694998,"sku":"14:350852#A4","price":8.61,"currency_code":"USD","in_stock":true},{"title":"A1","offer_id":49709272727766,"sku":"14:201739810#A1","price":8.61,"currency_code":"USD","in_stock":true},{"title":"A2","offer_id":49709272760534,"sku":"14:350686#A2","price":8.61,"currency_code":"USD","in_stock":true},{"title":"A3","offer_id":49709272793302,"sku":"14:350850#A3","price":8.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/5243\/8486\/files\/S50cca473e7b9447281eb5e72bea89b60v.webp?v=1785201778","url":"https:\/\/qmeboost.com\/products\/ph-meter-calibration-buffer-solution-ph-4-7-10-orp-222mv","provider":"Qme","version":"1.0","type":"link"}