{"product_id":"red-sea-reefato-ato-sensor","title":"Red Sea ReefATO ATO Sensor","description":"\u003cp\u003e\u003cstrong\u003eThe genuine factory sensor for a Red Sea ReefATO+ that has stopped reading level correctly.\u003c\/strong\u003e This is Red Sea's own combined level and temperature probe (part number R35622) — the sensor the ReefATO+ controller uses to decide when to top off, log tank temperature, and trigger the leak alarm. It is a direct-fit replacement, not a compatible third-party part.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state level sensing\u003c\/strong\u003e — a titanium probe reads water level electronically, with no float or moving part to jam or stick.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in thermometer\u003c\/strong\u003e — the same probe reports tank temperature to the ReefATO+ controller and app, accurate to ±0.1°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFail-safe backup probe\u003c\/strong\u003e — a second shutoff point roughly 2.5 cm above the primary stops the pump if the main probe misreads, rather than letting it run on.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 m cable\u003c\/strong\u003e — long enough to reach from most sump corners to the controller without an extension.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Red Sea part\u003c\/strong\u003e — factory-matched to the ReefATO+ controller's calibration; the current hardware revision is R35622-V3.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eR35622 (current hardware revision V3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensing technology\u003c\/th\u003e\n\u003ctd\u003eSolid-state (conductivity) titanium probe with built-in thermometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature accuracy\u003c\/th\u003e\n\u003ctd\u003e±0.1°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCable length\u003c\/th\u003e\n\u003ctd\u003e3 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFail-safe backup probe offset\u003c\/th\u003e\n\u003ctd\u003eApprox. 2.5 cm above primary shutoff point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eRed Sea ReefATO+ only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWill it fit my ReefATO?\u003c\/h3\u003e\u003cp\u003eThis sensor fits the Red Sea ReefATO+ — the current \"3-in-1\" top-off, thermometer and leak-detector unit. We can't confirm from Red Sea's published material whether it's backward-compatible with earlier hardware revisions of the ReefATO+ controller sold before this listing's V3 revision. If you're replacing a sensor on an older unit and you're not sure it will pair correctly, check with us before ordering rather than guessing.\u003c\/p\u003e\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\u003cp\u003eOne sensor probe on its 3 m cable, ready to plug into the ReefATO+ controller. The mounting bracket and corner-mount magnets are sold separately.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e replacing a ReefATO+ sensor that has failed, drifted, or is fouled beyond a clean.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e any top-off controller other than the Red Sea ReefATO+, or as a stand-alone level alarm without the ReefATO+ base unit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility, spares and supersession\u003c\/h3\u003e\u003cp\u003eGenuine Red Sea part R35622, current hardware revision V3 — matching the barcode on this listing. Fits the Red Sea ReefATO+ system. Related spares sold separately: the \u003ca href=\"\/products\/red-sea-reefato-corner-bracket\"\u003eReefATO corner mounting bracket\u003c\/a\u003e and the external corner-mount magnets. Red Sea has not published a supersession note for this part.\u003c\/p\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eWipe the probe face during your weekly maintenance. A film of algae on the tip is the most common cause of an ATO that tops off late or reads temperature inaccurately.\u003c\/p\u003e\u003ch3\u003eSafety\u003c\/h3\u003e\u003cp\u003eDisconnect the ReefATO+ from mains power before removing or replacing the sensor. The probe itself is designed to sit in water; the controller and power supply are not.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reefato-corner-bracket\"\u003eRed Sea ReefATO Corner Bracket\u003c\/a\u003e — needed to mount this sensor vertically in a non-Red Sea sump.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reefato-system\"\u003eRed Sea ReefATO+ System\u003c\/a\u003e — the full controller this sensor plugs into.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reefcan-18ltr\"\u003eRed Sea ReefCan 18L\u003c\/a\u003e — a top-up reservoir sized for ReefATO+ systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by our standard returns process for faulty goods, in addition to your rights under Australian Consumer Law. Standard freight.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow do I know the sensor needs replacing, rather than just cleaning?\u003c\/h4\u003e\u003cp\u003eClean the probe face first — algae film is the most common cause of a late or early top-off. If cleaning doesn't fix it, or the temperature reading has drifted, the sensor itself needs replacing.\u003c\/p\u003e\u003ch4\u003eDoes this include the mounting bracket?\u003c\/h4\u003e\u003cp\u003eNo. This listing is the sensor probe only. The corner bracket and magnets are sold separately.\u003c\/p\u003e\u003ch4\u003eWill this work with an older ReefATO+ controller?\u003c\/h4\u003e\u003cp\u003eIt's the current V3 hardware revision. Red Sea hasn't published cross-revision compatibility, so if you're unsure, ask us before ordering.\u003c\/p\u003e\u003ch4\u003eCan I use this with a sump that isn't made by Red Sea?\u003c\/h4\u003e\u003cp\u003eYes — mount it with the corner bracket and magnets (rated for glass up to 12 mm) rather than clipping it to a Red Sea glass triangle.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774162686243,"sku":"RED901e","price":75.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/RED901e_3.png?v=1772078915","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/red-sea-reefato-ato-sensor","provider":"Nicks AOT","version":"1.0","type":"link"}