{"product_id":"apera-t200-1-turbidity-standard-set","title":"Apera T200-1 Turbidity Standards, 20\/100\/400\/800 NTU (AI4204)","description":"\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;width:100%;max-width:1400px;margin:0 auto;color:#26332C;font-size:1rem;line-height:1.75;\" id=\"bts-ai4204-description\"\u003e\n\u003csection style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:clamp(20px,4vw,40px);background:#F1F7F3;border:1px solid #B7D0BF;border-radius:12px;\"\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;display:flex;flex-wrap:wrap;align-items:center;gap:clamp(24px,4vw,48px);\"\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;flex:1 1 340px;min-width:0;\"\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:.76rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:#245B45;margin:0 0 12px;\"\u003eAPERA INSTRUMENTS \/ AI4204\u003c\/p\u003e\n\u003ch2 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:clamp(24px,4vw,34px);font-weight:600;line-height:1.2;letter-spacing:-.02em;color:#245B45;margin:0 0 20px;\"\u003eReplace the four nonzero standards for TN400 and TN480.\u003c\/h2\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eT200-1 supplies four AMCO Clear polymer turbidity standards at 20, 100, 400 and 800 NTU for Apera TN400 and TN480 infrared meters. These are sealed, ready-to-use standards. A 0 NTU standard is not included, so plan the required zero-point reference separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;flex:1 1 340px;min-width:0;\"\u003e\u003cfigure style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;margin:0;min-width:0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-ai4204-1.webp?v=1792365145\" alt=\"Apera T200-1 four sealed turbidity standard vials labeled 20, 100, 400 and 800 NTU\" width=\"3000\" height=\"2000\" loading=\"eager\" style=\"display:block;width:100%;max-width:340px;height:auto;object-fit:contain;margin:0 auto;box-sizing:border-box;\"\u003e\u003cfigcaption style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:.82rem;line-height:1.55;color:#5D6C63;text-align:center;margin-top:10px;\"\u003eFour nonzero standards are supplied; a 0 NTU vial is not included.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:clamp(28px,5vw,56px) 0;border-bottom:1px solid #B7D0BF;\"\u003e\u003ch2 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:clamp(24px,4vw,34px);font-weight:600;line-height:1.2;letter-spacing:-.02em;color:#245B45;margin:0 0 20px;\"\u003eWhy choose this accessory?\u003c\/h2\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;display:flex;flex-wrap:wrap;gap:16px;\"\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;flex:1 1 240px;min-width:0;padding:24px;background:#fff;border:1px solid #DCE6DF;border-radius:10px;\"\u003e\n\u003ch3 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1.07rem;font-weight:600;color:#245B45;margin:0 0 12px;\"\u003eFour identified values\u003c\/h3\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eOne vial each at 20, 100, 400 and 800 NTU supports the corresponding nonzero calibration points. Select the correct value in the meter calibration menu.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;flex:1 1 240px;min-width:0;padding:24px;background:#fff;border:1px solid #DCE6DF;border-radius:10px;\"\u003e\n\u003ch3 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1.07rem;font-weight:600;color:#245B45;margin:0 0 12px;\"\u003eSealed standards\u003c\/h3\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eThe meter manuals distinguish these four nonzero standards from the refillable zero-point vial. Keep the nonzero vials sealed and replace them when expired.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;flex:1 1 240px;min-width:0;padding:24px;background:#fff;border:1px solid #DCE6DF;border-radius:10px;\"\u003e\n\u003ch3 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1.07rem;font-weight:600;color:#245B45;margin:0 0 12px;\"\u003eNo dilution step\u003c\/h3\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eUse the supplied standards at their labeled values. The product page describes ready-to-use polymer suspensions without dilution or routine resuspension.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003cdetails id=\"bts-ai4204-guide\" style=\"margin-top:28px;border:1px solid #FF931A;border-radius:10px;\"\u003e\u003csummary style=\"font-family:Open Sans,sans-serif;box-sizing:border-box;font-size:1rem;line-height:1.4;font-weight:600;cursor:pointer;background:#FF931A;padding:18px;border-radius:9px;\"\u003eWhich existing setup does this accessory support?\u003c\/summary\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:18px;\"\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:.76rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:#245B45;margin:0 0 12px;\"\u003eCURRENT ITEM: AI4204\u003c\/p\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eThese are documented parent-meter workflows, not meters supplied with this accessory. Match the part number and required calibration or vial procedure.\u003c\/p\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;display:flex;flex-wrap:wrap;gap:14px;\"\u003e\n\u003ca style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;display:block;flex:1 1 220px;min-width:0;padding:18px;background:#fff;border:1px solid #B7D0BF;border-radius:8px;text-decoration:none;color:#26332C;\" href=\"https:\/\/bluetigerscientific.com\/products\/apera-instruments-tn400-portable-turbidity-meter-iso-7027-compliant\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-tn400-hero-20261017-mfr.webp?v=1792254859\" alt=\"Apera TN400 Portable Infrared Turbidity Meter (ISO 7027)\" loading=\"eager\" width=\"105\" height=\"105\" style=\"display:block;width:105px;height:105px;object-fit:contain;margin:0 auto 12px;\"\u003e\u003ch3 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1.06rem;line-height:1.25;font-weight:600;color:#245B45;margin:0 0 8px;\"\u003eTN400\u003c\/h3\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:.78rem;font-weight:600;color:#245B45;margin:0 0 8px;\"\u003eRelated workflow\u003c\/p\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eParent turbidity meter. The meter and other accessories are separate from this order.\u003c\/p\u003e\n\u003cspan style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-weight:600;color:#245B45;text-decoration:underline;\"\u003eView product\u003c\/span\u003e\u003c\/a\u003e\u003ca style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;display:block;flex:1 1 220px;min-width:0;padding:18px;background:#fff;border:1px solid #B7D0BF;border-radius:8px;text-decoration:none;color:#26332C;\" href=\"https:\/\/bluetigerscientific.com\/products\/apera-instruments-tn480-portable-turbidity-meter-with-glp-data-logger-iso-7027-compliant\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/tn480_1.webp?v=1745614536\" alt=\"Apera TN480 Portable Infrared Turbidity Meter with Data Logging\" loading=\"eager\" width=\"105\" height=\"105\" style=\"display:block;width:105px;height:105px;object-fit:contain;margin:0 auto 12px;\"\u003e\u003ch3 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1.06rem;line-height:1.25;font-weight:600;color:#245B45;margin:0 0 8px;\"\u003eTN480\u003c\/h3\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:.78rem;font-weight:600;color:#245B45;margin:0 0 8px;\"\u003eRelated workflow\u003c\/p\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eParent turbidity meter. The meter and other accessories are separate from this order.\u003c\/p\u003e\n\u003cspan style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-weight:600;color:#245B45;text-decoration:underline;\"\u003eView product\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003csection style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:clamp(28px,5vw,56px) 0;border-bottom:1px solid #B7D0BF;\"\u003e\u003ch2 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:clamp(24px,4vw,34px);font-weight:600;line-height:1.2;letter-spacing:-.02em;color:#245B45;margin:0 0 20px;\"\u003eTypical applications\u003c\/h2\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;display:flex;flex-wrap:wrap;gap:16px;\"\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;flex:1 1 240px;min-width:0;padding:24px;background:#fff;border:1px solid #DCE6DF;border-radius:10px;\"\u003e\n\u003ch3 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1.07rem;font-weight:600;color:#245B45;margin:0 0 12px;\"\u003eReplace nonzero references\u003c\/h3\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eRefresh the nonzero standard set used by an existing TN400 or TN480. This is not a meter kit and does not supply a zero-point standard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;flex:1 1 240px;min-width:0;padding:24px;background:#fff;border:1px solid #DCE6DF;border-radius:10px;\"\u003e\n\u003ch3 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1.07rem;font-weight:600;color:#245B45;margin:0 0 12px;\"\u003eChoose calibration points\u003c\/h3\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eFollow the meter manual to choose two or more points that bracket the intended measurement range. Low-turbidity work may require 0 and 20 NTU, so this set alone does not cover that zero-point requirement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;flex:1 1 240px;min-width:0;padding:24px;background:#fff;border:1px solid #DCE6DF;border-radius:10px;\"\u003e\n\u003ch3 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1.07rem;font-weight:600;color:#245B45;margin:0 0 12px;\"\u003eHandle after storage\u003c\/h3\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eFor polymer standards unused for a long time, the parent manuals direct two slow inversions followed by a 2 minute rest. Avoid vigorous shaking and bubbles; the separate zero-point solution has different handling instructions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:clamp(28px,5vw,56px) 0;border-bottom:1px solid #B7D0BF;\"\u003e\u003ch2 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:clamp(24px,4vw,34px);font-weight:600;line-height:1.2;letter-spacing:-.02em;color:#245B45;margin:0 0 20px;\"\u003eWhat this order supplies\u003c\/h2\u003e\n\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;width:100%;max-width:100%;min-width:0;\"\u003e\u003ctable style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;width:100%;table-layout:fixed;border-collapse:collapse;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;text-align:left;background:#F1F7F3;font-weight:600;border:1px solid #B7D0BF;overflow-wrap:anywhere;\"\u003eOrder detail\u003c\/th\u003e\n\u003cth style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;text-align:left;background:#F1F7F3;font-weight:600;border:1px solid #B7D0BF;overflow-wrap:anywhere;\"\u003eConfiguration\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003eManufacturer catalog\u003c\/td\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003eAI4204\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003eBlue Tiger SKU\u003c\/td\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003eBTS-AI4204\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003eOrder unit\u003c\/td\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003eOne T200-1 set: 20, 100, 400 and 800 NTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003eNot included\u003c\/td\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003e0 NTU standard, meter, empty sample vials, silicone oil and cleaning cloth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003eSelection note\u003c\/td\u003e\n\u003ctd style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:12px;border:1px solid #B7D0BF;vertical-align:top;overflow-wrap:anywhere;\"\u003eFor TN400 and TN480 infrared meters; do not substitute solely by matching NTU numbers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:clamp(28px,5vw,56px) 0;border-bottom:1px solid #B7D0BF;\"\u003e\u003ch2 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:clamp(24px,4vw,34px);font-weight:600;line-height:1.2;letter-spacing:-.02em;color:#245B45;margin:0 0 20px;\"\u003eUse the correct setup and care procedure.\u003c\/h2\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eBefore ordering, confirm TN400 or TN480 and the required calibration values. T200-1 supplies four nonzero standards; arrange the zero-point reference separately when your procedure requires it.\u003c\/p\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eKeep the vials sealed, never freeze them and follow the printed expiry. For safety or disposal questions, request the applicable product safety information and follow local requirements.\u003c\/p\u003e\n\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eFor warranty information or return authorization, contact Blue Tiger Scientific before sending any item. Do not assume that the parent meter warranty applies to a separately purchased accessory.\u003c\/p\u003e\u003c\/section\u003e\u003csection style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:30px 0;line-height:1.2;\" id=\"bts-ai4204-faq\"\u003e\u003ch2 style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:clamp(24px,4vw,34px);font-weight:600;line-height:1.2;letter-spacing:-.02em;color:#245B45;margin:0 0 20px;\"\u003eAI4204 buyer questions\u003c\/h2\u003e\n\u003cdetails style=\"border:1px solid #B7D0BF;border-radius:8px;background:#fff;margin:0 0 10px;\"\u003e\u003csummary style=\"font-family:Open Sans,sans-serif;font-size:1rem;font-weight:600;line-height:1.2;padding:16px;cursor:pointer;box-sizing:border-box;\"\u003eWhich values are included in T200-1?\u003c\/summary\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:0 16px 4px;\"\u003e\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eThe set contains one standard vial each at 20, 100, 400 and 800 NTU. All four values are nonzero.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #B7D0BF;border-radius:8px;background:#fff;margin:0 0 10px;\"\u003e\u003csummary style=\"font-family:Open Sans,sans-serif;font-size:1rem;font-weight:600;line-height:1.2;padding:16px;cursor:pointer;box-sizing:border-box;\"\u003eDoes this set include everything for zero-point calibration?\u003c\/summary\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:0 16px 4px;\"\u003e\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eNo. It does not include a 0 NTU standard. Follow your meter manual and obtain the required zero-point reference separately, especially for low-turbidity work.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #B7D0BF;border-radius:8px;background:#fff;margin:0 0 10px;\"\u003e\u003csummary style=\"font-family:Open Sans,sans-serif;font-size:1rem;font-weight:600;line-height:1.2;padding:16px;cursor:pointer;box-sizing:border-box;\"\u003eWhich meters is this set for?\u003c\/summary\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:0 16px 4px;\"\u003e\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eApera explicitly lists TN400 and TN480 infrared turbidity meters. Do not choose a standard for a different optical system solely because its NTU value matches.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #B7D0BF;border-radius:8px;background:#fff;margin:0 0 10px;\"\u003e\u003csummary style=\"font-family:Open Sans,sans-serif;font-size:1rem;font-weight:600;line-height:1.2;padding:16px;cursor:pointer;box-sizing:border-box;\"\u003eShould I open the vials or dilute the contents?\u003c\/summary\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:0 16px 4px;\"\u003e\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eNo. The parent manuals direct users to keep the four nonzero standard vials sealed. Use each at its labeled value without dilution. Their handling is different from a refillable 0 NTU vial.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #B7D0BF;border-radius:8px;background:#fff;margin:0 0 10px;\"\u003e\u003csummary style=\"font-family:Open Sans,sans-serif;font-size:1rem;font-weight:600;line-height:1.2;padding:16px;cursor:pointer;box-sizing:border-box;\"\u003eShould I shake the standards before calibration?\u003c\/summary\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:0 16px 4px;\"\u003e\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eThey are normally used directly. If unused for a long time, the parent manuals specify slowly inverting the polymer-standard vial twice and letting it stand for 2 minutes. Do not shake vigorously or introduce bubbles.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #B7D0BF;border-radius:8px;background:#fff;margin:0 0 10px;\"\u003e\u003csummary style=\"font-family:Open Sans,sans-serif;font-size:1rem;font-weight:600;line-height:1.2;padding:16px;cursor:pointer;box-sizing:border-box;\"\u003eHow should I store them, and when do they expire?\u003c\/summary\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:0 16px 4px;\"\u003e\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eKeep them at room temperature and never freeze them. The parent manuals specify 5 to 30°C for calibration-solution storage. Follow the printed vial\/lot expiry; the manufacturer photograph directs users to the vial bottom for the expiry date.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #B7D0BF;border-radius:8px;background:#fff;margin:0 0 10px;\"\u003e\u003csummary style=\"font-family:Open Sans,sans-serif;font-size:1rem;font-weight:600;line-height:1.2;padding:16px;cursor:pointer;box-sizing:border-box;\"\u003eHow do I clean the outside of a standard vial?\u003c\/summary\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:0 16px 4px;\"\u003e\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eKeep it sealed. Follow the meter procedure for a clean exterior, using a small drop of silicone oil when needed, distributing it with a lint-free cloth and removing excess. Do not wash or refill the inside of a sealed nonzero standard vial.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #B7D0BF;border-radius:8px;background:#fff;margin:0 0 10px;\"\u003e\u003csummary style=\"font-family:Open Sans,sans-serif;font-size:1rem;font-weight:600;line-height:1.2;padding:16px;cursor:pointer;box-sizing:border-box;\"\u003eDoes using these standards make my meter EPA-compliant?\u003c\/summary\u003e\u003cdiv style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:0 16px 4px;\"\u003e\u003cp style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:1rem;line-height:1.75;margin:0 0 16px;\"\u003eNo. A standard-material approval does not establish compliance of an instrument, laboratory or analytical method. Confirm that your complete meter, procedure and reporting requirements match the applicable method.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Apera Instruments","offers":[{"title":"Default Title","offer_id":53014315270442,"sku":"BTS-AI4204","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-ai4204-1.webp?v=1792365145","url":"https:\/\/bluetigerscientific.com\/products\/apera-t200-1-turbidity-standard-set","provider":"Blue Tiger Scientific","version":"1.0","type":"link"}