{"product_id":"vivosun-ph-calibration-powder-18-pack","title":"Vivosun pH Buffer Solution Powder Kit | 18-Pack","description":"\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch2\u003eVivosun pH Buffer Solution Powder Kit | 18-Pack\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cp\u003eEvery pH meter drifts over time. An uncalibrated meter can read a few tenths off, which is enough to push your nutrient solution out of range while the display says everything is fine. The Vivosun pH Buffer Powder Calibration Kit keeps your readings honest. It includes 18 pre-measured packets across three reference points (pH 4.00, 6.86, and 9.18), each accurate to ±0.01 pH at 25°C (77°F), so you can recalibrate any pH meter quickly and trust the results.\u003c\/p\u003e\n\u003cp\u003eEach packet is individually sealed to lock in freshness and accuracy, and the high-purity powders hold their values even after long-term storage. Mixing is simple: empty a packet into a clean glass beaker, add 250 ml of deionized or distilled water, and stir until the powder dissolves, which takes seconds. The powders contain no harmful substances, and the compact 2.4\" × 3.2\" packets tuck easily into a drawer, tool bag, or pocket for calibration on the go.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 20px 0;\"\u003e\u003cvideo src=\"https:\/\/cdn.shopify.com\/videos\/c\/o\/v\/dbd843035f3c43ceb5fcb1636a7e1231.mp4\" style=\"width: 100%; height: auto; border-radius: 8px;\" autoplay=\"autoplay\" muted=\"\" loop=\"loop\" playsinline=\"\" controls=\"controls\" loading=\"lazy\"\u003e\n\u003c\/video\u003e\u003c\/div\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cstyle\u003e\n  .image-gallery-container{max-width:1000px;margin:20px auto;}\n  .image-gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;}\n  .gallery-item{aspect-ratio:1;overflow:hidden;border-radius:8px;}\n  .gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform 0.3s ease;display:block;}\n  .gallery-item:hover img{transform:scale(1.05);}\n  @media (max-width:768px){\n    .image-gallery{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;gap:12px;}\n    .gallery-item{flex:0 0 85%;scroll-snap-align:start;}\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"image-gallery-container\"\u003e\n\u003cdiv class=\"image-gallery\"\u003e\n\u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_18-Pack_pH_Meter_Buffer_Powder_2.jpg?v=1790362795\" alt=\"Vivosun pH buffer powder packets with ±0.01 pH accuracy at 25°C\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_18-Pack_pH_Meter_Buffer_Powder_3.jpg?v=1790362795\" alt=\"Vivosun pH 6.86 buffer powder dissolving quickly in water\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_18-Pack_pH_Meter_Buffer_Powder_7.jpg?v=1790362795\" alt=\"Vivosun pH 4.00, 6.86, and 9.18 buffers compatible with any pH meter\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_18-Pack_pH_Meter_Buffer_Powder_4.jpg?v=1790362795\" alt=\"Vivosun individually sealed pH buffer powder packet\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .features-grid-container{display:flex;flex-wrap:wrap;justify-content:center;gap:1rem;padding:2rem 0;font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;margin:0 auto;max-width:1240px;}\n  .feature-card{background-color:transparent;padding:1.5rem;border-radius:8px;text-align:center;flex:0 1 240px;box-sizing:border-box;}\n\u003c\/style\u003e\n\u003cdiv class=\"features-grid-container\"\u003e\n\u003cdiv class=\"feature-card\"\u003e\n\u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🎯\u003c\/span\u003e\n\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003e±0.01 pH Accuracy\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eHigh-purity buffers deliver precise calibration at 25°C (77°F) for reliable readings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"feature-card\"\u003e\n\u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🧪\u003c\/span\u003e\n\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eThree Reference Points\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eSix packets each of pH 4.00, 6.86, and 9.18 support multi-point calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"feature-card\"\u003e\n\u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e📦\u003c\/span\u003e\n\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eIndividually Sealed\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eEach packet stays fresh and accurate until use, and is easy to carry and store.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"feature-card\"\u003e\n\u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e⚡\u003c\/span\u003e\n\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eQuick Dissolution\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003ePre-measured powder dissolves fast in 250 ml of water for instant calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"feature-card\"\u003e\n\u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🔄\u003c\/span\u003e\n\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eWorks With Any pH Meter\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eCompatible with any pH tester and probe, from pocket pens to benchtop meters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"feature-card\"\u003e\n\u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🗄️\u003c\/span\u003e\n\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eLong-Term Stability\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eBuffers hold their values in storage, so one kit covers many calibrations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e6x pH 4.00 Buffer Powder Packets\u003c\/li\u003e\n\u003cli\u003e6x pH 6.86 Buffer Powder Packets\u003c\/li\u003e\n\u003cli\u003e6x pH 9.18 Buffer Powder Packets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 style=\"margin-bottom: 0;\"\u003eSpecifications\u003c\/h4\u003e\n\u003cstyle\u003e.styled-spec-container{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid #eee;border-radius:8px;margin-bottom:1em;}.styled-spec-table{width:100%;border-collapse:collapse;}.styled-spec-table thead{background-color:#f8f8f8;}.styled-spec-table th,.styled-spec-table td{padding:12px 15px;text-align:left;vertical-align:top;}.styled-spec-table th{font-weight:bold;color:#333;border-bottom:2px solid #ccc;}.styled-spec-table td{border-bottom:1px solid #eee;}.styled-spec-table tbody td:first-child{font-weight:500;color:#444;}.styled-spec-table tbody tr:last-child td{border-bottom:none;}\u003c\/style\u003e\n\u003cdiv class=\"styled-spec-container\"\u003e\n\u003ctable class=\"styled-spec-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\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\u003eBuffer pH Values\u003c\/td\u003e\n\u003ctd\u003e4.00, 6.86, 9.18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.01 pH at 25°C (77°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e18 packets (6 of each value)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolution Volume\u003c\/td\u003e\n\u003ctd\u003e250 ml per packet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Required\u003c\/td\u003e\n\u003ctd\u003eDeionized or distilled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePacket Size\u003c\/td\u003e\n\u003ctd\u003e2.4\" × 3.2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eAny pH meter or probe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eCool, dry place\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch4\u003eHow to Use\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eEmpty the entire packet into a clean glass beaker.\u003c\/li\u003e\n\u003cli\u003eAdd 250 ml of deionized or distilled water.\u003c\/li\u003e\n\u003cli\u003eStir gently until the powder is fully dissolved.\u003c\/li\u003e\n\u003cli\u003eCalibrate your pH meter following its manufacturer's instructions.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch4 style=\"margin-bottom: 0;\"\u003eCalibration Values by Temperature\u003c\/h4\u003e\n\u003cdiv class=\"styled-spec-container\"\u003e\n\u003ctable class=\"styled-spec-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e°F \/ °C\u003c\/th\u003e\n\u003cth\u003epH 4.00\u003c\/th\u003e\n\u003cth\u003epH 6.86\u003c\/th\u003e\n\u003cth\u003epH 9.18\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e50°F \/ 10°C\u003c\/td\u003e\n\u003ctd\u003e4.00\u003c\/td\u003e\n\u003ctd\u003e6.92\u003c\/td\u003e\n\u003ctd\u003e9.33\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e59°F \/ 15°C\u003c\/td\u003e\n\u003ctd\u003e4.00\u003c\/td\u003e\n\u003ctd\u003e6.90\u003c\/td\u003e\n\u003ctd\u003e9.28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e68°F \/ 20°C\u003c\/td\u003e\n\u003ctd\u003e4.00\u003c\/td\u003e\n\u003ctd\u003e6.88\u003c\/td\u003e\n\u003ctd\u003e9.23\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e77°F \/ 25°C\u003c\/td\u003e\n\u003ctd\u003e4.00\u003c\/td\u003e\n\u003ctd\u003e6.86\u003c\/td\u003e\n\u003ctd\u003e9.18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e86°F \/ 30°C\u003c\/td\u003e\n\u003ctd\u003e4.01\u003c\/td\u003e\n\u003ctd\u003e6.85\u003c\/td\u003e\n\u003ctd\u003e9.14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e95°F \/ 35°C\u003c\/td\u003e\n\u003ctd\u003e4.02\u003c\/td\u003e\n\u003ctd\u003e6.84\u003c\/td\u003e\n\u003ctd\u003e9.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e104°F \/ 40°C\u003c\/td\u003e\n\u003ctd\u003e4.03\u003c\/td\u003e\n\u003ctd\u003e6.84\u003c\/td\u003e\n\u003ctd\u003e9.07\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e113°F \/ 45°C\u003c\/td\u003e\n\u003ctd\u003e4.04\u003c\/td\u003e\n\u003ctd\u003e6.83\u003c\/td\u003e\n\u003ctd\u003e9.04\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e122°F \/ 50°C\u003c\/td\u003e\n\u003ctd\u003e4.06\u003c\/td\u003e\n\u003ctd\u003e6.83\u003c\/td\u003e\n\u003ctd\u003e9.03\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003cp\u003eThe Vivosun pH Buffer Powder Calibration Kit is a consumable product sold as-is with no warranty.\u003c\/p\u003e\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cdiv class=\"faq-container\"\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow do I prepare the buffer solution?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eEmpty one packet into a clean glass beaker, add 250 ml of deionized or distilled water, and stir gently until the powder fully dissolves. The solution is then ready for calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eWill this work with my pH meter?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eYes. The buffer powders are compatible with any pH tester and probe. Follow your meter's calibration instructions to determine which reference points (4.00, 6.86, and\/or 9.18) to use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eWhy should I use distilled or deionized water?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eTap and filtered water contain minerals that can shift the buffer's pH value. Distilled or deionized water keeps the solution at its labeled reference point for accurate calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eDoes water temperature affect calibration?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eBuffer values shift slightly with temperature, as shown in the calibration table above. Vivosun pH meters have Automatic Temperature Compensation (ATC), so temperature is handled automatically. For meters without ATC, use the table to match the correct value to your solution temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow long do the packets last in storage?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eEach packet is individually sealed to preserve freshness and accuracy, and the buffers maintain their pH values through long-term storage. Keep unopened packets in a cool, dry place.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eAre the buffer powders safe to handle?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eYes. The powders contain no harmful substances, making them safe for routine calibration at home or in the grow room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"VIVOSUN","offers":[{"title":"Default Title","offer_id":52552443494616,"sku":"WEB-PHP-0001","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_18-Pack_pH_Meter_Buffer_Powder_1.jpg?v=1790362795","url":"https:\/\/trimleaf.com\/products\/vivosun-ph-calibration-powder-18-pack","provider":"Trimleaf","version":"1.0","type":"link"}