{"product_id":"bluelab-ph-penplus-ph-temp-meter-replaceable-probe","title":"Bluelab pH PenPlus - Replaceable Probe pH \u0026 Temp Pen","description":"\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\u003ch2\u003eBluelab pH PenPlus - Replaceable Probe pH \u0026amp; Temp Pen\u003c\/h2\u003e\u003cdiv\u003e\n\u003cp\u003eWorn-out pH probes force growers to replace an entire meter just to keep readings accurate — an unnecessary cost when only the probe has failed. While the standard \u003ca href=\"\/products\/bluelab-ph-pen-compact-ph-temp-reader-floats\"\u003eBluelab pH Pen\u003c\/a\u003e is a reliable favorite, the PenPlus solves this issue of probe wear with a screw-cap replaceable pH and Temperature probe, letting you swap in a new probe in seconds instead of buying a new pen.\u003c\/p\u003e\n\u003cp\u003eBuilt around a double-junction pH probe for consistent accuracy, the pH PenPlus reads pH from 0.0–14.0 with ±0.1 accuracy and tracks temperature from 32–122°F (0–50°C). A silicone cap filled with \u003ca href=\"\/products\/bluelab-kcl-storage-solution-keep-probes-hydrated\"\u003eBluelab KCl storage solution\u003c\/a\u003e uses an internal sponge to keep the probe hydrated between uses, while an IP68 dustproof and waterproof rating and bright backlit display make it dependable in demanding grow room and reservoir conditions.\u003c\/p\u003e\n\u003cp\u003eDay-to-day operation stays simple: a 2-point calibration process with a 30-day reminder keeps the pH PenPlus accurate without guesswork, and an auto-off function conserves battery life between uses. The compact handheld design includes an integrated lanyard with a waterproof silicone probe cap, making it easy to carry between reservoirs. For growers who also need to check nutrient levels, this pen is the perfect companion to the \u003ca href=\"\/products\/bluelab-truncheon-meter-ec-cf-ppm-no-calibration\"\u003eBluelab Truncheon Meter\u003c\/a\u003e. Each PenPlus ships with calibration solution sachets and storage solution, giving growers everything needed to start taking accurate readings right out of the box.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv style=\"position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; margin: 20px 0; border-radius: 8px;\"\u003e\u003ciframe loading=\"lazy\" style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%;\" src=\"https:\/\/www.youtube.com\/embed\/5_IuWWQ4wpo?autoplay=1\u0026amp;mute=1\u0026amp;playsinline=1\u0026amp;loop=1\u0026amp;playlist=5_IuWWQ4wpo\u0026amp;controls=0\u0026amp;rel=0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\u003ch4\u003eFeatures\u003c\/h4\u003e\u003cstyle\u003e.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;}.feature-card{background-color:transparent;padding:1.5rem;border-radius:8px;text-align:center;flex:0 1 240px;box-sizing:border-box;}\u003c\/style\u003e\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\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eDouble-Junction pH Probe\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eDelivers consistent, reliable pH readings across a full 0.0–14.0 range.\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\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eReplaceable Probe Design\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eScrew-cap pH\/Temperature probe swaps out in seconds, extending the pen's usable life.\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\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eHydrated Probe Cap\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eKCl-filled silicone cap with internal sponge keeps the probe hydrated between uses.\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\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eIP68 Waterproof \u0026amp; Dustproof\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eSealed rating protects internal electronics from moisture and grow room dust.\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\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eQuick 2-Point Calibration\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eSimple calibration with a 30-day reminder keeps readings accurate over time.\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\u003ch5 style=\"font-size: 1.1em; font-weight: bold; color: #333; margin: 0.75rem 0 0.5rem 0;\"\u003eBacklit Display\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eBright screen stays easy to read in low-light grow environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBluelab pH PenPlus with replaceable pH and Temperature probe\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bluelab-ph-7-buffer-neutral-point-calibration\"\u003eBluelab pH 7.0 Calibration Solution\u003c\/a\u003e (18ml \/ 0.6fl oz, single-use)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bluelab-ph-40-buffer-low-range-calibration\"\u003eBluelab pH 4.0 Calibration Solution\u003c\/a\u003e (18ml \/ 0.6fl oz, single-use)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/bluelab-kcl-storage-solution-keep-probes-hydrated\"\u003eBluelab KCl Storage Solution\u003c\/a\u003e (18ml \/ 0.6fl oz)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4 style=\"margin-bottom: 0;\"\u003eSpecifications\u003c\/h4\u003e\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\u003cdiv class=\"styled-spec-container\"\u003e\u003ctable class=\"styled-spec-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Range\u003c\/td\u003e\n\u003ctd\u003e0.0–14.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Resolution\u003c\/td\u003e\n\u003ctd\u003e0.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH Accuracy (at 25°C \/ 77°F)\u003c\/td\u003e\n\u003ctd\u003e±0.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e32–122°F (0–50°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Resolution\u003c\/td\u003e\n\u003ctd\u003e1°C \/ 1°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Accuracy\u003c\/td\u003e\n\u003ctd\u003e±1°C \/ ±2°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Environment\u003c\/td\u003e\n\u003ctd\u003eNutrient solution, 0.2 EC and above; 32–122°F (0–50°C) — do not use or store outside this range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e1x AAA alkaline battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch4\u003eSupport \u0026amp; Manuals\u003c\/h4\u003e\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Bluelab_pH_PenPlus_Manual_V01_2026-03-30.pdf?v=1789574944\" rel=\"noopener noreferrer\" style=\"display: inline-flex; align-items: center; background-color: #f7f7f7; border: 1px solid #ddd; border-radius: 8px; padding: 12px 18px; text-decoration: none; color: #333; transition: background-color 0.3s ease, box-shadow 0.3s ease;\" target=\"_blank\"\u003e \u003cspan style=\"font-size: 1.5em; margin-right: 12px;\"\u003e📄\u003c\/span\u003e \u003cspan style=\"font-weight: bold;\"\u003epH PenPlus Manual\u003c\/span\u003e \u003c\/a\u003e\u003c\/div\u003e\u003ch4\u003eWarranty\u003c\/h4\u003e\u003cp\u003eThe Bluelab pH PenPlus is covered by a 2-year limited warranty.\u003c\/p\u003e\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\u003cdiv class=\"faq-container\"\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow do I replace the probe on the Bluelab pH PenPlus?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\u003cdiv\u003e\u003cp\u003eThe probe uses a screw-cap design — unscrew the used pH probe and thread in a new one. No tools are needed, though you'll want to recalibrate after installing a fresh probe.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow often should I calibrate the pH PenPlus?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\u003cdiv\u003e\u003cp\u003eBluelab recommends regular 2-point calibration, and the pen includes a built-in 30-day reminder so you don't miss a cycle.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eWhat temperature range can the pH PenPlus be used in?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\u003cdiv\u003e\u003cp\u003eIt operates and reads accurately between 32–122°F (0–50°C). Avoid using or storing the pen outside this range, as it can affect probe performance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eIs the Bluelab pH PenPlus waterproof?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\u003cdiv\u003e\u003cp\u003eYes. It carries an IP68 dustproof and waterproof rating, making it suitable for wet grow room and reservoir environments.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eWhat's included in the box?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\u003cdiv\u003e\u003cp\u003eEach PenPlus ships with the pen and replaceable probe, plus single-use 7.0 and 4.0 pH calibration solution sachets and a KCl storage solution sachet to get you started.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eWhat warranty comes with the pH PenPlus?\u003c\/span\u003e \u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\u003cdiv\u003e\u003cp\u003eThe Bluelab pH PenPlus is covered by a 2-year limited warranty.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":52473135825112,"sku":"PENPLUSPH","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Bluelab_pH_PenPlus_3.png?v=1789575504","url":"https:\/\/trimleaf.com\/products\/bluelab-ph-penplus-ph-temp-meter-replaceable-probe","provider":"Trimleaf","version":"1.0","type":"link"}