{"product_id":"aqua-master-tools-replacement-ph-ec-probes-h600-w650-c800-p700","title":"Aqua Master Tools Replacement pH \u0026 EC Probes: H600, W650, C800 \u0026 P700","description":"\u003ch2\u003eReplacement pH and EC Probes for Aqua Master Meters and Controllers\u003c\/h2\u003e\n\u003cp\u003eThese are the replacement probes for \u003cstrong\u003eAqua Master Tools\u003c\/strong\u003e meters and controllers that use probes on cables: the H600 Pro, H600 Pro Substrate, W650 Pro, C800 Pro and P700 Pro2. Because each probe plugs in separately, you only replace the one that's worn.\u003c\/p\u003e\n\u003cp\u003eThe connector decides what fits. pH probes use a round \u003cstrong\u003eBNC\u003c\/strong\u003e twist-lock connector. EC probes use a \u003cstrong\u003epin\u003c\/strong\u003e connector, in a small or large size. Check the table below, or the connectors on your existing probes, before you order.\u003c\/p\u003e\n\u003cp\u003epH probes are the part that wears out. The reference liquid inside slowly becomes contaminated, and readings get slower and less stable until the probe won't calibrate. Good storage in KCl solution slows this down, but every pH probe has a working life. EC probes last much longer, but limescale, nutrient build-up or a damaged cable can stop them reading properly.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eW650 Pro Inline\u003c\/strong\u003e and \u003cstrong\u003eC800 Pro Inline\u003c\/strong\u003e use threaded industrial probes, not these. Those are sold separately.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eProbe\u003c\/th\u003e\n\u003cth\u003eH600 Pro\u003c\/th\u003e\n\u003cth\u003eH600 Pro Substrate\u003c\/th\u003e\n\u003cth\u003eW650 Pro\u003c\/th\u003e\n\u003cth\u003eC800 Pro\u003c\/th\u003e\n\u003cth\u003eP700 Pro2\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003epH probe, BNC\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH substrate probe, BNC\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEC probe, small pin\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEC substrate probe, small pin\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEC probe, large pin\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003epH probe, BNC:\u003c\/strong\u003e a long, double-junction pH probe for liquids. The double junction slows contamination of the reference liquid, which gives it a longer working life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH substrate probe, BNC:\u003c\/strong\u003e a glass-tipped spike in a tough plastic body for testing directly in coco, compost and soft, moist soil. Also fits the S300 substrate pen.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEC probe, small pin:\u003c\/strong\u003e for liquids, with built-in temperature sensing. Also fits the E300 substrate pen.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEC substrate probe, small pin:\u003c\/strong\u003e a stainless steel spike for testing in growing media. It's very hard to damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEC probe, large pin:\u003c\/strong\u003e for the P700 Pro2 combo meter only. Reads EC, CF, PPM and temperature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix-month warranty\u003c\/strong\u003e on each probe\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitting a new probe\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect the old probe. Twist and pull for BNC, pull straight out for pin connectors.\u003c\/li\u003e\n\u003cli\u003eConnect the new probe.\u003c\/li\u003e\n\u003cli\u003eFor pH probes, soak the tip in tap water for at least 12 hours. White salt crystals on the tip are normal.\u003c\/li\u003e\n\u003cli\u003eCalibrate the meter before use.\u003c\/li\u003e\n\u003cli\u003eStore pH probes with a few drops of KCl storage solution in the protective cap.\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 probe you need, call or message the team with your meter's model name and we'll confirm it.\u003c\/p\u003e","brand":"Aqua Master Tools","offers":[{"title":"pH probe, BNC","offer_id":59224861573494,"sku":null,"price":41.99,"currency_code":"GBP","in_stock":false},{"title":"pH substrate probe, BNC","offer_id":59224861606262,"sku":null,"price":48.99,"currency_code":"GBP","in_stock":false},{"title":"EC probe, small pin","offer_id":59224861639030,"sku":null,"price":41.99,"currency_code":"GBP","in_stock":false},{"title":"EC substrate probe, small pin","offer_id":59224861671798,"sku":null,"price":52.99,"currency_code":"GBP","in_stock":false},{"title":"EC probe for P700 Pro2, large pin","offer_id":59224861704566,"sku":null,"price":46.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/9301\/4772\/files\/p700-pro-2-ph-electrode-4758-en-G_1426f93d-2e43-4228-8867-e7ab344eca90.jpg?v=1793613753","url":"https:\/\/www.growell.co.uk\/products\/aqua-master-tools-replacement-ph-ec-probes-h600-w650-c800-p700","provider":"GroWell","version":"1.0","type":"link"}