{"product_id":"aqua-master-pen-meter-electrodes","title":"Aqua Master Pen Meter Replacement Electrodes - P50, E50 \u0026 P110","description":"\u003ch2\u003eBring Your Aqua Master Pen Back to Life with a Replacement Electrode\u003c\/h2\u003e\n\u003cp\u003eA tired electrode doesn't mean a new meter. These genuine \u003cstrong\u003eAqua Master replacement electrodes\u003c\/strong\u003e fit the \u003cstrong\u003eP50, E50 and P110\u003c\/strong\u003e pen meters, both the Pro and the newer Pro2, and are IP67 waterproof once fitted.\u003c\/p\u003e\n\u003ch3\u003eWhy You Need It\u003c\/h3\u003e\n\u003cp\u003eElectrodes age. pH glass slows down as its reference liquid gets used up, and every sensor eventually stops holding a calibration. If your pen won't calibrate even with fresh batteries and fresh solution, or readings creep instead of settling, the electrode is usually the culprit.\u003c\/p\u003e\n\u003ch3\u003eWhich Electrode Fits Your Pen?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eP50 electrode (AMT1001)\u003c\/th\u003e\n\u003ctd\u003eP50 Pro and P50 Pro2 pH meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eE50 electrode (AMT1006)\u003c\/th\u003e\n\u003ctd\u003eE50 Pro and E50 Pro2 EC meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eP110 electrode (AMT1014)\u003c\/th\u003e\n\u003ctd\u003eP110 Pro and P110 Pro2 combo pens, combined pH and EC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eHow To Fit an Aqua Master Pen Electrode\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove the old one:\u003c\/strong\u003e unscrew the sealing ring at the base of the meter and gently pull the old electrode out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit the new one:\u003c\/strong\u003e line up the recess so the connectors meet properly, check the rubber seal is seated and tighten the ring firmly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoak pH electrodes:\u003c\/strong\u003e stand P50 and P110 electrodes in tap water for at least 12 hours before use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrate:\u003c\/strong\u003e calibrate the meter before taking readings.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eTop tip:\u003c\/strong\u003e Make the new one last longer than the old one. Store P50 electrodes with a few drops of \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/products\/growth-technology-ph-probe-refill-storage-solution-300ml\"\u003eKCl storage solution\u003c\/a\u003e in the cap, and never in RO or distilled water.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThere's white crust on my new pH electrode. Is it faulty?\u003c\/strong\u003e\u003cbr\u003eNo. Dried salts are normal and the 12-hour soak dissolves them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs there a warranty?\u003c\/strong\u003e\u003cbr\u003eYes, Aqua Master covers electrodes for six months against defects in materials and manufacture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeed help choosing?\u003c\/strong\u003e Call our growing experts on 01782 749955 or visit One Stop Grow Shop Stoke at Fenton Trade Park.\u003c\/p\u003e\n\u003cp\u003eStill on the old pen? \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/collections\/grow-tools-slash-accessories-meters\"\u003eBrowse our full range of pH and EC meters\u003c\/a\u003e.\u003c\/p\u003e","brand":"AQUA MASTER","offers":[{"title":"P50 pH Electrode","offer_id":57511657668986,"sku":null,"price":20.99,"currency_code":"GBP","in_stock":false},{"title":"E50 EC Electrode","offer_id":57511657701754,"sku":null,"price":20.99,"currency_code":"GBP","in_stock":false},{"title":"P110 pH and EC Electrode","offer_id":57511657734522,"sku":null,"price":36.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/6368\/6447\/files\/AquaMasterPenMeterReplacementElectrodes-P50_E50_P110.jpg?v=1793877225","url":"https:\/\/www.onestopgrowshop.co.uk\/products\/aqua-master-pen-meter-electrodes","provider":"One Stop Grow Shop","version":"1.0","type":"link"}