{"product_id":"aqua-master-tools-pen-meter-replacement-electrodes","title":"Aqua Master Tools Pen Meter Replacement Electrodes","description":"\u003ch2\u003eReplacement pH and EC Electrodes for Aqua Master Pen Meters\u003c\/h2\u003e\n\u003cp\u003eThese are the replacement electrodes for \u003cstrong\u003eAqua Master Tools\u003c\/strong\u003e P50, E50 and P110 pen meters. Each one fits both the current \u003cstrong\u003ePro2\u003c\/strong\u003e model and the original Pro, so check the model name on your meter and pick the matching variant.\u003c\/p\u003e\n\u003cp\u003eThe electrode is the part of a meter that wears out. A pH electrode is a thin glass bulb filled with a reference liquid, and that liquid slowly becomes contaminated with use. As it does, readings get slower and less stable, until the meter won't calibrate at all. Replacing the electrode brings the meter back to full accuracy for a fraction of the price of a new one.\u003c\/p\u003e\n\u003cp\u003eEC electrodes last much longer, but limescale, nutrient build-up or a crack in the housing can still stop them reading properly.\u003c\/p\u003e\n\u003cp\u003eThese electrodes fit \u003cstrong\u003epen meters only\u003c\/strong\u003e. For the H600 Pro, W650 Pro, C800 Pro and P700 Pro2, which use probes on cables, see our Replacement Probes listing.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eP50 pH electrode:\u003c\/strong\u003e for the P50 Pro2 and P50 Pro pH and temperature meters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eE50 EC electrode:\u003c\/strong\u003e for the E50 Pro2 and E50 Pro EC and temperature meters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eP110 pH and EC electrode:\u003c\/strong\u003e one combined electrode for the P110 Pro2 and P110 Pro combo pens\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP67 waterproof\u003c\/strong\u003e once fitted, the same as the meter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix-month warranty\u003c\/strong\u003e on each electrode\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSigns your electrode needs replacing\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReadings are slow to settle\u003c\/li\u003e\n\u003cli\u003eThe meter won't accept a calibration, or loses it within days\u003c\/li\u003e\n\u003cli\u003eReadings jump around in the same sample\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eClean the tip and recalibrate first. If the problem stays, it's time for a new electrode.\u003c\/p\u003e\n\u003ch3\u003eHow to fit it\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eUnscrew the sealing ring at the bottom of the meter.\u003c\/li\u003e\n\u003cli\u003eGently pull the old electrode straight out.\u003c\/li\u003e\n\u003cli\u003eLine up the notch on the new electrode so the connectors meet properly, then push it in.\u003c\/li\u003e\n\u003cli\u003eCheck the rubber seal is seated, and tighten the sealing ring firmly.\u003c\/li\u003e\n\u003cli\u003eFor pH electrodes, soak the tip in tap water for at least 12 hours.\u003c\/li\u003e\n\u003cli\u003eCalibrate the meter before use.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eOrder online, or use free Click \u0026amp; Collect from your local GroWell shop. If you're not sure which electrode fits your meter, call or message the team with the model name on the back and we'll confirm it.\u003c\/p\u003e","brand":"Aqua Master Tools","offers":[{"title":"P50 Pro2 and P50 Pro (pH)","offer_id":59224860328310,"sku":null,"price":24.99,"currency_code":"GBP","in_stock":false},{"title":"E50 Pro2 and E50 Pro (EC)","offer_id":59224860361078,"sku":null,"price":20.99,"currency_code":"GBP","in_stock":false},{"title":"P110 Pro2 and P110 Pro (pH and EC)","offer_id":59224860393846,"sku":null,"price":36.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/9301\/4772\/files\/AquaMasterToolsPenMeterReplacementElectrodes.jpg?v=1793708267","url":"https:\/\/www.growell.co.uk\/products\/aqua-master-tools-pen-meter-replacement-electrodes","provider":"GroWell","version":"1.0","type":"link"}