{"product_id":"bluelab-ph-pen-compact-ph-temp-reader-floats","title":"Bluelab pH Pen - Waterproof pH \u0026 Temp Meter","description":"\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\u003ch2\u003eBluelab pH Pen - Waterproof pH \u0026amp; Temp Meter\u003c\/h2\u003e\u003cdiv\u003e\n\u003cp\u003eGrabbing an accurate pH reading shouldn't require a full lab setup. The Bluelab pH Pen delivers fast, reliable pH and temperature readings in a compact handheld design, helping growers keep nutrient uptake on track without slowing down their workflow.\u003c\/p\u003e\n\u003cp\u003eA double-junction pH probe drives consistent accuracy, while a bright backlit display keeps results easy to read in any lighting. Simple 2-point calibration with a built-in 30-day reminder keeps the pen dialed in over time, and a fully waterproof build means it floats rather than sinks if it ends up in your reservoir.\u003c\/p\u003e\n\u003cp\u003eFor growers who want a complete measurement system, the pH Pen pairs naturally with a \u003ca href=\"\/products\/bluelab-conductivity-pen-ec-temp-reader-ready-to-use\"\u003eBluelab Conductivity Pen\u003c\/a\u003e—or you can find both together in the \u003ca href=\"\/products\/bluelab-ph-ec-starter-pack-meters-solutions-care-kit\"\u003eBluelab pH and Conductivity Starter Pack\u003c\/a\u003e. For those seeking advanced features, the \u003ca href=\"\/products\/bluelab-onepen-ph-ec-temp-meter-bluetooth-connected\"\u003eBluelab OnePen\u003c\/a\u003e offers 3-in-1 pH, EC, and temperature testing with Bluetooth connectivity.\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\/dBNePsATNFA?autoplay=1\u0026amp;mute=1\u0026amp;playsinline=1\u0026amp;loop=1\u0026amp;playlist=dBNePsATNFA\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;\"\u003eCompact Handheld Design\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eSized for convenient one-handed use anywhere in the grow room.\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, easy-to-read screen keeps readings clear in any lighting.\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;\"\u003eDouble-Junction pH Probe\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eDelivers accurate, consistent pH measurements reading after reading.\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;\"\u003eBuilt-in 30-day reminder keeps the pen accurate without guesswork.\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;\"\u003eDual Temperature Units\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eReads temperature in °C or °F to fit your preferred workflow.\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;\"\u003eWaterproof \u0026amp; Floats\u003c\/h5\u003e\n\u003cp style=\"font-size: 0.95em; line-height: 1.6; color: #555; margin: 0;\"\u003eFully waterproof build floats in any solution instead of sinking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBluelab pH Pen\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_Pen_Manual.pdf?v=1789577953\" 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 Pen Manual\u003c\/span\u003e \u003c\/a\u003e\u003c\/div\u003e\u003ch4\u003eWarranty\u003c\/h4\u003e\u003cp\u003eThe Bluelab pH Pen is covered by a 1-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\u003eDoes the Bluelab pH Pen require calibration?\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, but it's quick — a simple 2-point calibration, with a built-in 30-day reminder so you always know when it's due.\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 pH Pen 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's fully waterproof and actually floats if dropped in a reservoir, rather than sinking.\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\u003eCan the pH Pen read temperature too?\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 displays temperature alongside pH, and you can switch between °C and °F.\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 with the pH Pen?\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 pen ships with single-use \u003ca href=\"\/products\/bluelab-ph-7-buffer-neutral-point-calibration\"\u003epH 7.0\u003c\/a\u003e and \u003ca href=\"\/products\/bluelab-ph-40-buffer-low-range-calibration\"\u003epH 4.0\u003c\/a\u003e calibration solution sachets and a \u003ca href=\"\/products\/bluelab-kcl-storage-solution-keep-probes-hydrated\"\u003eKCl storage solution\u003c\/a\u003e to keep the probe ready between uses.\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 Pen 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 it outside this range.\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 the difference between the pH Pen and 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 pH Pen has a fixed probe, while the \u003ca href=\"\/products\/bluelab-ph-penplus-ph-temp-meter-replaceable-probe\"\u003eBluelab pH PenPlus\u003c\/a\u003e features a screw-cap replaceable probe for easier long-term maintenance.\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":52473262375128,"sku":"PENPH","price":89.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Bluelab_pH_Pen_1.png?v=1789578039","url":"https:\/\/trimleaf.com\/products\/bluelab-ph-pen-compact-ph-temp-reader-floats","provider":"Trimleaf","version":"1.0","type":"link"}