{"product_id":"bluelab-ph-probeplus","title":"Bluelab pH ProbePlus – Replacement Probe for pH PenPlus","description":"\u003ch2\u003eBring a tired pH PenPlus back to full accuracy in minutes\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eBluelab pH ProbePlus\u003c\/strong\u003e is the genuine replacement \u003cstrong\u003epH and temperature probe\u003c\/strong\u003e for the \u003cstrong\u003eBluelab pH PenPlus\u003c\/strong\u003e. Every pH probe wears with use, and the PenPlus was designed so that when it does, you change the probe rather than the whole meter. The ProbePlus fits by hand with \u003cstrong\u003eno tools\u003c\/strong\u003e, uses the same \u003cstrong\u003edouble-junction\u003c\/strong\u003e design as the original and comes with a \u003cstrong\u003eKCl-filled storage cap\u003c\/strong\u003e plus pH 7.0, pH 4.0 and KCl sachets, so it is ready to calibrate and use the day it arrives.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade for the pH PenPlus\u003c\/strong\u003e – restores pH and temperature readings without buying a new pen\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble-junction probe\u003c\/strong\u003e for steadier readings and a longer working life in nutrient solution\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool-free fitting\u003c\/strong\u003e – take the worn probe off and fit the new one by hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull 0–14 pH range\u003c\/strong\u003e with \u003cstrong\u003e±0.1 pH\u003c\/strong\u003e accuracy once calibrated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKCl-filled storage cap\u003c\/strong\u003e keeps the glass bulb hydrated between readings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration sachets included\u003c\/strong\u003e – pH 7.0, pH 4.0 and KCl storage solution for the first calibration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReadings That Drift or Will Not Calibrate\u003c\/h3\u003e\u003cp\u003eA pH probe is a consumable part. As the glass bulb and reference junction age, readings creep, settle slowly or refuse to calibrate, and a pen that reads a few tenths out has you correcting a reservoir that was fine, or missing one that has drifted into the range where \u003cstrong\u003enutrient uptake\u003c\/strong\u003e suffers. If a clean, a KCl soak and a fresh two-point calibration do not bring the PenPlus back, the probe is worn out and the ProbePlus is the fix.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwap the probe:\u003c\/strong\u003e remove the worn probe and fit the ProbePlus by hand.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrate\u003c\/strong\u003e in fresh pH 7.0 first, rinse, then pH 4.0, using the sachets supplied.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRinse\u003c\/strong\u003e the tip in fresh tap water between solutions and after every reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStore wet:\u003c\/strong\u003e keep KCl storage solution in the cap; never RO, distilled or deionised water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean and recalibrate every 30 days\u003c\/strong\u003e, when the PenPlus calibration reminder appears.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Bluelab pH PenPlus only (not the standard pH Pen or the OnePen)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasures:\u003c\/strong\u003e pH and temperature\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH range:\u003c\/strong\u003e 0.0–14.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.1 pH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProbe type:\u003c\/strong\u003e double-junction pH probe with temperature sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating environment:\u003c\/strong\u003e solutions of 0.2 EC and above, 0–60 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting:\u003c\/strong\u003e by hand, no tools\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn the box:\u003c\/strong\u003e pH ProbePlus with KCl-filled storage cap, pH 7.0 and pH 4.0 calibration sachets, KCl storage solution sachet, getting started guide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 6 months\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluelab part code:\u003c\/strong\u003e PROBPLUSPH\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cdiv class=\"hcs-faq\"\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWill this fit the standard Bluelab pH Pen or the OnePen?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eNo. It is made for the pH PenPlus only. The standard pH Pen has a sealed probe, and the OnePen takes its own Bluelab OnePen Replacement Probe.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eHow do I know my probe needs replacing?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eIf readings drift, respond slowly or the pen will not complete a two-point calibration even after you have cleaned the tip and soaked it in KCl storage solution, the glass has aged and the probe should be replaced.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eDo I need to calibrate after fitting it?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. Run a two-point calibration in pH 7.0 then pH 4.0 before the first reading. Single-use sachets of both come with the probe.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003ch3\u003eWorks Well With\u003c\/h3\u003e\u003cdiv class=\"hcs-related\" style=\"display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 0;\"\u003e\n\u003ca href=\"\/products\/bluelab-ph-penplus\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-ph-penplus-1.jpg?v=1790229364\u0026amp;width=160\" alt=\"Bluelab pH PenPlus\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab pH PenPlus\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eThe pen this probe is made for\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/bluelab-ph-7-0-solution-sachets\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-ph-7-0-solution-sachets-1.png?v=1790169276\u0026amp;width=160\" alt=\"Bluelab pH 7.0 Solution Sachets\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab pH 7.0 Solution Sachets\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eFirst calibration point after fitting\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/bluelab-ph-4-0-solution-sachets\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-ph-4-0-solution-sachets-default-title-1.png?v=1790169273\u0026amp;width=160\" alt=\"Bluelab pH 4.0 Solution Sachets\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab pH 4.0 Solution Sachets\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eSecond calibration point\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/kcl-ph-probe-storage-solution\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/kcl-ph-probe-storage-solution.jpg?v=1787262443\u0026amp;width=160\" alt=\"Growth Technology KCL Storage Solution\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eGrowth Technology KCL Storage Solution\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eKeeps the probe tip hydrated\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":53929890480394,"sku":"TLS-BLUE-019-01","price":57.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-ph-probeplus-default-title-1.jpg?v=1792261679","url":"https:\/\/hydrocropshop.co.uk\/products\/bluelab-ph-probeplus","provider":"Hydro Crop Shop","version":"1.0","type":"link"}