{"product_id":"apera-201dj-f-ai1319","title":"Apera 201DJ-F Double-Junction pH\/Temperature Electrode, BNC\/RCA (AI1319)","description":"\u003cdiv class=\"bts-r-page\" id=\"bts-ai1319-description\" 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;\"\u003e\n\u003csection style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:clamp(20px,4vw,48px);border:1px solid #B7D0BF;background:#F1F7F3;border-radius:14px;\"\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;align-items:center;gap:clamp(24px,4vw,48px);\"\u003e\n\u003cdiv style=\"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 \/ 201DJ-F \/ AI1319\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;\"\u003epH and temperature.\u003cbr\u003eA double-junction water-sample electrode.\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;\"\u003eThe Apera 201DJ-F is a double-junction pH\/temperature electrode for general and complex water samples, including wastewater and environmental monitoring. Separate BNC and RCA connections carry the pH and temperature signals.\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;\"\u003eVerify both meter connections and temperature-sensor support. Calibrate with fresh pH buffers, rinse between samples and use the manufacturer’s electrode-care procedure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-photo-square-final-20261019.webp?v=1792430574\" target=\"_blank\" rel=\"noopener\" aria-label=\"View larger: Apera 201DJ-F manufacturer catalog excerpt.\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-photo-square-final-20261019.webp?v=1792430574\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-photo-square-final-20261019.webp?v=1792430574\u0026amp;width=360 360w, https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-photo-square-final-20261019.webp?v=1792430574\u0026amp;width=640 640w, https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-photo-square-final-20261019.webp?v=1792430574\u0026amp;width=1000 1000w\" sizes=\"(max-width:600px) calc(100vw - 48px), 680px\" alt=\"Apera 201DJ-F manufacturer catalog excerpt.\" width=\"1600\" height=\"1600\" loading=\"lazy\" decoding=\"async\" style=\"display:block;width:100%;max-width:460px;height:auto;object-fit:contain;margin:0 auto;\"\u003e\u003c\/a\u003e\u003cfigcaption style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:.86rem;line-height:1.65;color:#5D6C63;margin-top:12px;\"\u003eApera 201DJ-F manufacturer catalog excerpt. Tap or click the image for a larger view.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003cdetails class=\"bts-r-selector\" style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;border:1px solid #FF931A;border-radius:10px;padding:0;margin:24px 0;background:#fff;\"\u003e\u003csummary style=\"display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px;background:#FF931A;color:#172b4d;cursor:pointer;border-radius:9px;font-weight:600;line-height:1.5;\"\u003e\u003cspan style=\"display:block;flex:1;min-width:0;\"\u003e\u003cspan style=\"display:block;font-size:clamp(17px,2.6vw,21px);font-weight:700;line-height:1.35;\"\u003eChoose the electrode and host-meter setup\u003c\/span\u003e\u003cspan class=\"bts-r-closed\" style=\"display:block;font-size:.88rem;font-weight:400;line-height:1.55;margin-top:5px;\"\u003eClick or tap to compare your options\u003c\/span\u003e\u003cspan class=\"bts-r-open\" style=\"font-size:.88rem;font-weight:400;line-height:1.55;margin-top:5px;\"\u003eCompare below — click or tap here to close\u003c\/span\u003e\u003c\/span\u003e\u003cspan aria-hidden=\"true\" class=\"bts-r-toggle\" style=\"display:flex;align-items:center;justify-content:center;flex:0 0 38px;width:38px;height:38px;border:1px solid rgba(23,43,77,.35);border-radius:50%;background:#fff;font-size:27px;font-weight:400;line-height:1;\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\u003cdiv class=\"bts-r-selector-inner\" style=\"padding:20px;\"\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;\"\u003eCheck the sensing method, connector and temperature requirements before ordering. A connector that fits does not by itself establish compatibility.\u003c\/p\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:16px;\"\u003e\n\u003cdiv class=\"bts-r-model-card\" style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;display:flex;gap:16px;align-items:center;flex:1 1 270px;min-width:0;padding:18px;border:2px solid #FF931A;border-radius:10px;background:#FFF9F0;color:#26332C;text-decoration:none;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-catalog-square-1600-20261019.webp?v=1792430114\u0026amp;width=180\" alt=\"201DJ-F product reference\" width=\"90\" height=\"90\" loading=\"lazy\" style=\"width:90px;height:90px;object-fit:contain;flex:0 0 90px;\"\u003e\u003cspan style=\"display:block;min-width:0;\"\u003e\u003cstrong style=\"display:block;color:#245B45;font-size:1.08rem;line-height:1.4;\"\u003e201DJ-F\u003c\/strong\u003e\u003cspan style=\"display:block;font-size:.9rem;line-height:1.6;margin-top:5px;\"\u003eBNC + RCA · pH Electrode\u003c\/span\u003e\u003cspan style=\"display:inline-block;margin-top:10px;color:#245B45;font-weight:600;font-size:.88rem;\"\u003eCurrent configuration\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ca href=\"https:\/\/bluetigerscientific.com\/products\/apera-ph700-benchtop-ph-meter-kit\" class=\"bts-r-model-card\" style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;display:flex;gap:16px;align-items:center;flex:1 1 270px;min-width:0;padding:18px;border:1px solid #DCE6DF;border-radius:10px;background:#fff;color:#26332C;text-decoration:none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/bts-ph700-hero-20261014.png?v=1792014687\u0026amp;width=180\" alt=\"PH700 product reference\" width=\"90\" height=\"90\" loading=\"lazy\" style=\"width:90px;height:90px;object-fit:contain;flex:0 0 90px;\"\u003e\u003cspan style=\"display:block;min-width:0;\"\u003e\u003cstrong style=\"display:block;color:#245B45;font-size:1.08rem;line-height:1.4;\"\u003ePH700\u003c\/strong\u003e\u003cspan style=\"display:block;font-size:.9rem;line-height:1.6;margin-top:5px;\"\u003eReview the host meter and its replacement-electrode requirements.\u003c\/span\u003e\u003cspan style=\"display:inline-block;margin-top:10px;color:#245B45;font-weight:600;font-size:.88rem;\"\u003eView product →\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\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;\"\u003eLinked cards open current store listings. Other cards compare configurations; they do not imply current storefront availability.\u003c\/p\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;\"\u003eKnow what you are ordering.\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;\"\u003eOne 201DJ-F pH\/temperature electrode. Meter, buffers and storage solution are separate.\u003c\/p\u003e\n\u003cdiv aria-label=\"Ordering detail table\" role=\"region\" tabindex=\"0\" style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;overflow-x:auto;width:100%;max-width:100%;\"\u003e\u003ctable style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;width:100%;border-collapse:collapse;font-size:1rem;border:1px solid #e0e0e0;table-layout:fixed;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\" style=\"background:#f5f5f5;text-align:left;padding:12px;font-size:1rem;font-weight:700;border:1px solid #e0e0e0;width:50%;overflow-wrap:anywhere;\"\u003eOrdering detail\u003c\/th\u003e\n\u003cth scope=\"col\" style=\"background:#f5f5f5;text-align:left;padding:12px;font-size:1rem;font-weight:700;border:1px solid #e0e0e0;width:50%;overflow-wrap:anywhere;\"\u003eConfiguration\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003cth scope=\"row\" style=\"padding:12px;text-align:left;font-size:1rem;line-height:1.6;vertical-align:top;border:1px solid #e0e0e0;width:50%;font-weight:600;overflow-wrap:anywhere;\"\u003eProduct\u003c\/th\u003e\n\u003ctd style=\"padding:12px;font-size:1rem;line-height:1.6;vertical-align:top;border:1px solid #e0e0e0;width:50%;overflow-wrap:anywhere;\"\u003e201DJ-F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f9f9;\"\u003e\n\u003cth scope=\"row\" style=\"padding:12px;text-align:left;font-size:1rem;line-height:1.6;vertical-align:top;border:1px solid #e0e0e0;width:50%;font-weight:600;overflow-wrap:anywhere;\"\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd style=\"padding:12px;font-size:1rem;line-height:1.6;vertical-align:top;border:1px solid #e0e0e0;width:50%;overflow-wrap:anywhere;\"\u003eAI1319\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003cth scope=\"row\" style=\"padding:12px;text-align:left;font-size:1rem;line-height:1.6;vertical-align:top;border:1px solid #e0e0e0;width:50%;font-weight:600;overflow-wrap:anywhere;\"\u003eBlue Tiger SKU\u003c\/th\u003e\n\u003ctd style=\"padding:12px;font-size:1rem;line-height:1.6;vertical-align:top;border:1px solid #e0e0e0;width:50%;overflow-wrap:anywhere;\"\u003eBTS-AI1319\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f9f9;\"\u003e\n\u003cth scope=\"row\" style=\"padding:12px;text-align:left;font-size:1rem;line-height:1.6;vertical-align:top;border:1px solid #e0e0e0;width:50%;font-weight:600;overflow-wrap:anywhere;\"\u003eOrder unit\u003c\/th\u003e\n\u003ctd style=\"padding:12px;font-size:1rem;line-height:1.6;vertical-align:top;border:1px solid #e0e0e0;width:50%;overflow-wrap:anywhere;\"\u003eOne replacement electrode\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\u003cdiv style=\"display:flex;flex-wrap:wrap;align-items:center;gap:clamp(24px,4vw,48px);\"\u003e\n\u003cdiv style=\"flex:1 1 320px;min-width:0;\"\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;\"\u003eTwo connections.\u003cbr\u003eTwo measurement signals.\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;\"\u003eThe BNC connection carries the pH signal; the RCA connection carries the temperature signal. The 201DJ-F adds temperature sensing to the double-junction electrode format, unlike the BNC-only 201DJ-C.\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;\"\u003eConfirm thermistor compatibility with the meter as well as the plugs. Apera describes the electrode for general and complex water samples, including wastewater and environmental monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 320px;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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-connector-guide-figure-20261019.webp?v=1792430175\" target=\"_blank\" rel=\"noopener\" aria-label=\"View larger: Apera manufacturer connector guide; the BNC\/RCA row illustrates separate pH and temperature connections.\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-connector-guide-figure-20261019.webp?v=1792430175\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-connector-guide-figure-20261019.webp?v=1792430175\u0026amp;width=360 360w, https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-connector-guide-figure-20261019.webp?v=1792430175\u0026amp;width=640 640w, https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-connector-guide-figure-20261019.webp?v=1792430175\u0026amp;width=1000 1000w\" sizes=\"(max-width:600px) calc(100vw - 48px), 680px\" alt=\"Apera manufacturer connector guide; the BNC\/RCA row illustrates separate pH and temperature connections.\" width=\"1515\" height=\"630\" loading=\"lazy\" decoding=\"async\" style=\"display:block;width:100%;max-width:560px;height:auto;object-fit:contain;margin:0 auto;\"\u003e\u003c\/a\u003e\u003cfigcaption style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:.86rem;line-height:1.65;color:#5D6C63;margin-top:12px;\"\u003eApera manufacturer connector guide; the BNC\/RCA row illustrates separate pH and temperature connections. Tap or click the image for a larger view.\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\u003cdiv style=\"display:flex;flex-wrap:wrap;align-items:center;gap:clamp(24px,4vw,48px);\"\u003e\n\u003cdiv style=\"flex:1 1 320px;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\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-catalog-figure-20261019.webp?v=1792430120\" target=\"_blank\" rel=\"noopener\" aria-label=\"View larger: Apera 201DJ-F product-catalog row, including its operating window and connector.\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-catalog-figure-20261019.webp?v=1792430120\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-catalog-figure-20261019.webp?v=1792430120\u0026amp;width=360 360w, https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-catalog-figure-20261019.webp?v=1792430120\u0026amp;width=640 640w, https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-catalog-figure-20261019.webp?v=1792430120\u0026amp;width=1000 1000w\" sizes=\"(max-width:600px) calc(100vw - 48px), 680px\" alt=\"Apera 201DJ-F product-catalog row, including its operating window and connector.\" width=\"1485\" height=\"225\" loading=\"lazy\" decoding=\"async\" style=\"display:block;width:100%;max-width:560px;height:auto;object-fit:contain;margin:0 auto;\"\u003e\u003c\/a\u003e\u003cfigcaption style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;font-size:.86rem;line-height:1.65;color:#5D6C63;margin-top:12px;\"\u003eApera 201DJ-F product-catalog row, including its operating window and connector. Tap or click the image for a larger view.\u003c\/figcaption\u003e\u003c\/figure\u003e\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 320px;min-width:0;\"\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;\"\u003eA double junction\u003cbr\u003efor aqueous work.\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;\"\u003eThe double-junction reference design is intended for general and complex water-sample workflows. Choose an application-specific electrode if the sample chemistry, temperature or physical form falls outside the published operating window.\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;\"\u003eApera specifies 0–14 pH and 0–80°C for the 201DJ-F. The catalog excerpt also identifies the Ø12 × 160 mm body and BNC\/RCA format.\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;\"\u003eCalibrate, measure\u003cbr\u003eand store with care.\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;\"\u003eUse fresh pH buffers appropriate to your method, rinse between samples and allow the reading to stabilize. Follow the electrode instructions for cleaning and storage.\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 a host example, review \u003ca href=\"https:\/\/bluetigerscientific.com\/products\/apera-ph700-benchtop-ph-meter-kit\" style=\"color:#245B45;font-weight:600;text-decoration:underline;\"\u003ePH700 with BNC\/RCA inputs\u003c\/a\u003e. Confirm the exact replacement-electrode and temperature specifications for your meter before ordering.\u003c\/p\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;\"\u003eCheck the specifications.\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;\"\u003eUse the complete Product Specifications tab to verify the measurement range, temperature limit, connector and order details against your application.\u003c\/p\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;\"\u003eCompare related products.\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;\"\u003e\u003ca href=\"https:\/\/bluetigerscientific.com\/products\/apera-602-flexible-electrode-holder-ai2810\" style=\"color:#245B45;font-weight:600;text-decoration:underline;\"\u003e602 holder — position the electrode during testing\u003c\/a\u003e \u003ca href=\"https:\/\/bluetigerscientific.com\/products\/apera-601-magnetic-stirrer-with-electrode-holder-ai2803\" style=\"color:#245B45;font-weight:600;text-decoration:underline;\"\u003e601 stirrer with electrode holder — mix and support samples\u003c\/a\u003e\u003c\/p\u003e\u003c\/section\u003e\u003csection style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:28px 0;\"\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;\"\u003e201DJ-F buyer questions\u003c\/h2\u003e\n\u003cdetails class=\"bts-r-faq\" style=\"border:1px solid #e0e0e0;border-radius:6px;margin:0 0 10px;background:#fff;\"\u003e\u003csummary style=\"font-size:1rem;line-height:1.3;font-weight:600;padding:16px;cursor:pointer;\"\u003eWhat is the 201DJ-F used for?\u003c\/summary\u003e\u003cdiv style=\"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;\"\u003epH and temperature measurement in general and complex aqueous samples, including wastewater and environmental monitoring.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"bts-r-faq\" style=\"border:1px solid #e0e0e0;border-radius:6px;margin:0 0 10px;background:#fff;\"\u003e\u003csummary style=\"font-size:1rem;line-height:1.3;font-weight:600;padding:16px;cursor:pointer;\"\u003eWhich connectors does it use?\u003c\/summary\u003e\u003cdiv style=\"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;\"\u003eBNC for pH and RCA for temperature. Confirm the meter supports both connections and the sensor specification.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"bts-r-faq\" style=\"border:1px solid #e0e0e0;border-radius:6px;margin:0 0 10px;background:#fff;\"\u003e\u003csummary style=\"font-size:1rem;line-height:1.3;font-weight:600;padding:16px;cursor:pointer;\"\u003eHow does 201DJ-F differ from 201DJ-C?\u003c\/summary\u003e\u003cdiv style=\"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;\"\u003e201DJ-F includes temperature sensing and BNC\/RCA connections. 201DJ-C is the BNC pH-electrode version.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"bts-r-faq\" style=\"border:1px solid #e0e0e0;border-radius:6px;margin:0 0 10px;background:#fff;\"\u003e\u003csummary style=\"font-size:1rem;line-height:1.3;font-weight:600;padding:16px;cursor:pointer;\"\u003eWhat is its pH range?\u003c\/summary\u003e\u003cdiv style=\"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 specifies 0–14 pH.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"bts-r-faq\" style=\"border:1px solid #e0e0e0;border-radius:6px;margin:0 0 10px;background:#fff;\"\u003e\u003csummary style=\"font-size:1rem;line-height:1.3;font-weight:600;padding:16px;cursor:pointer;\"\u003eWhat sample temperature can it handle?\u003c\/summary\u003e\u003cdiv style=\"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 catalog specifies 0–80°C (32–176°F).\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"bts-r-faq\" style=\"border:1px solid #e0e0e0;border-radius:6px;margin:0 0 10px;background:#fff;\"\u003e\u003csummary style=\"font-size:1rem;line-height:1.3;font-weight:600;padding:16px;cursor:pointer;\"\u003eIs a meter included?\u003c\/summary\u003e\u003cdiv style=\"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. This listing is for one replacement electrode.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"bts-r-faq\" style=\"border:1px solid #e0e0e0;border-radius:6px;margin:0 0 10px;background:#fff;\"\u003e\u003csummary style=\"font-size:1rem;line-height:1.3;font-weight:600;padding:16px;cursor:pointer;\"\u003eIs it intended for every non-aqueous solvent?\u003c\/summary\u003e\u003cdiv style=\"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 describes this electrode for water solutions. Select an application-specific electrode when testing solvents or other demanding samples.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"bts-r-faq\" style=\"border:1px solid #e0e0e0;border-radius:6px;margin:0 0 10px;background:#fff;\"\u003e\u003csummary style=\"font-size:1rem;line-height:1.3;font-weight:600;padding:16px;cursor:pointer;\"\u003eWhat else do I need?\u003c\/summary\u003e\u003cdiv style=\"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;\"\u003eA compatible meter, suitable fresh pH buffers and the manufacturer-recommended care and storage supplies.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/section\u003e\u003csection style=\"font-family:'Open Sans',sans-serif;font-weight:300;box-sizing:border-box;padding:28px;background:#F1F7F3;border:1px solid #B7D0BF;border-radius:12px;\"\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;\"\u003eConfirm the exact configuration before ordering.\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;\"\u003eReview 201DJ-F AI1319 against your measurement method, sample limits and host connection. Return to the price and ordering controls when the configuration fits your work.\u003c\/p\u003e\n\u003ca href=\"#\" style=\"color:#245B45;font-weight:600;text-decoration:underline;\"\u003eBack to price and ordering ↑\u003c\/a\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Apera Instruments","offers":[{"title":"Default Title","offer_id":53026170765610,"sku":"BTS-AI1319","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/apera-201djf-photo-square-final-20261019_8bb10ea8-7b24-407c-b7ae-160238d1d9a8.webp?v=1792431069","url":"https:\/\/bluetigerscientific.com\/products\/apera-201dj-f-ai1319","provider":"Blue Tiger Scientific","version":"1.0","type":"link"}