{"product_id":"ph-meter-calibration-solution-50ml-4-00-7-00-10-01-orp-222mv","title":"pH Meter Calibration Solution 4.00 7.00 10.01 \u0026 ORP 222mV – 50mL","description":"\n\u003ch2\u003eHELTC 50mL pH \u0026amp; ORP Calibration Buffer Solution\u003c\/h2\u003e\n\u003cp\u003eKeep your pH meter and ORP tester reading with precision using this HELTC 50mL Standard Calibration Solution. Available in pH 4.00, 7.00, and 10.01 buffer values, as well as 222mV for ORP calibration, this solution ensures your instruments stay accurate and reliable — whether you're testing water quality, aquariums, hydroponics, pools, or laboratory samples.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Calibrate Regularly?\u003c\/h3\u003e\n\u003cp\u003epH electrodes drift over time. Regular calibration with a certified buffer solution is essential to maintaining measurement accuracy. This compact 50mL bottle is perfect for single-point or multi-point calibration routines, giving you confidence in every reading.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Buffer Values:\u003c\/strong\u003e Available in pH 4.00, 7.00, 10.01, and ORP 222mV — covering acidic, neutral, and alkaline ranges\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Works with most standard pH meters and ORP testers on the market\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Convenient:\u003c\/strong\u003e 50mL bottle (approx. 6.6 × 4 × 4 cm \/ 2.59 × 1.57 × 1.57 in) — easy to store and use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Quality Formula:\u003c\/strong\u003e Consistent, stable buffer solution for dependable calibration results every time\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Battery Required:\u003c\/strong\u003e Ready to use straight from the bottle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e HELTC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVolume:\u003c\/strong\u003e 50mL per bottle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 6.6 × 4 × 4 cm \/ 2.59 × 1.57 × 1.57 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable Buffer Values:\u003c\/strong\u003e pH 4.00, pH 7.00, pH 10.01, ORP 222mV\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Included:\u003c\/strong\u003e No\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 50mL pH \/ ORP Calibration Buffer Solution (selected value)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAquarium \u0026amp; fish tank water testing\u003c\/li\u003e\n  \u003cli\u003eHydroponics \u0026amp; gardening pH management\u003c\/li\u003e\n  \u003cli\u003eSwimming pool \u0026amp; spa water monitoring\u003c\/li\u003e\n  \u003cli\u003eHome \u0026amp; laboratory water quality testing\u003c\/li\u003e\n  \u003cli\u003eFood \u0026amp; beverage quality checks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more on accurate water quality measurement standards, visit the \u003ca href=\"https:\/\/www.epa.gov\/waterdata\/water-quality-data\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eU.S. Environmental Protection Agency – Water Quality Data\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/are-you-pooping-funny-cat-bathroom-canvas-wall-art-print\"\u003eFunny Cat Bathroom Canvas Wall Art Print\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-percent-better-every-day-motivational-canvas-wall-poster-inspirational-quote\"\u003e\"1% Better Every Day\" Motivational Canvas Poster\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Due to manual measurement, slight dimensional variance (±5–10mm) may occur. Colors may vary slightly depending on monitor settings, lighting, and display calibration.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What pH buffer values does this calibration solution come in?\u003c\/h4\u003e\n\u003cp\u003eA: This HELTC calibration solution is available in pH 4.00 (acidic), pH 7.00 (neutral), pH 10.01 (alkaline), and ORP 222mV, allowing you to perform single-point or multi-point calibration on most standard pH meters and ORP testers.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How often should I calibrate my pH meter with this solution?\u003c\/h4\u003e\n\u003cp\u003eA: For best accuracy, it is recommended to calibrate your pH meter before each use or at least once a week if used regularly. Frequent calibration ensures your readings remain precise, especially in critical applications such as aquariums, hydroponics, or water quality testing.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this calibration solution compatible with my pH meter?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — this is a standard buffer solution compatible with the vast majority of pH meters and ORP testers available on the market. Simply check that your meter supports the buffer value (4.00, 7.00, or 10.01) you select, and follow your meter's calibration instructions.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How much solution is included and how long will it last?\u003c\/h4\u003e\n\u003cp\u003eA: Each bottle contains 50mL of buffer solution. For typical home or hobbyist use — such as aquarium or hydroponics monitoring — a 50mL bottle can last through many calibration sessions, as only a small amount is needed each time.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What pH buffer values does this calibration solution come in?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This HELTC calibration solution is available in pH 4.00 (acidic), pH 7.00 (neutral), pH 10.01 (alkaline), and ORP 222mV, allowing you to perform single-point or multi-point calibration on most standard pH meters and ORP testers.\"}}, {\"@type\": \"Question\", \"name\": \"How often should I calibrate my pH meter with this solution?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For best accuracy, it is recommended to calibrate your pH meter before each use or at least once a week if used regularly. 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For typical home or hobbyist use — such as aquarium or hydroponics monitoring — a 50mL bottle can last through many calibration sessions, as only a small amount is needed each time.\"}}]}\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:\/\/vd0uzy-jp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Aquarium \u0026 Fish\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/collections\/aquarium-fish\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"pH Meter Calibration Solution 4.00 7.00 10.01 \u0026 ORP 222mV – 50mL\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/products\/ph-meter-calibration-solution-50ml-4-00-7-00-10-01-orp-222mv\"}]}\u003c\/script\u003e","brand":"Peaceful Pleasures Health and Wellness","offers":[{"title":"A4","offer_id":53668265951545,"sku":"1005011976231080-A4","price":9.23,"currency_code":"USD","in_stock":true},{"title":"A2","offer_id":53668265984313,"sku":"1005011976231080-A2","price":9.23,"currency_code":"USD","in_stock":true},{"title":"A1","offer_id":53668266017081,"sku":"1005011976231080-A1","price":13.03,"currency_code":"USD","in_stock":true},{"title":"A3","offer_id":53668266049849,"sku":"1005011976231080-A3","price":9.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/3689\/5801\/files\/S59c55fd2fb57410784acdef6610ca84dj.webp?v=1783036559","url":"https:\/\/peacefulpleasureswellness.com\/products\/ph-meter-calibration-solution-50ml-4-00-7-00-10-01-orp-222mv","provider":"Peaceful Pleasures Health and Wellness","version":"1.0","type":"link"}