{"product_id":"reefato-ato-sensor","title":"ReefATO+ ATO Sensor","description":"\u003cp\u003e\u003cstrong\u003eThe sensor that tells your ReefATO+ when to stop.\u003c\/strong\u003e This is Red Sea's genuine replacement probe for the ReefATO+ 3-in-1 auto top-off system — a solid-state, titanium level sensor with an integrated thermometer, swapping in for the original sensor when it drifts, fouls or fails outright. It suits any ReefATO+ owner seeing erratic top-off behaviour, an unstable temperature reading, or outright sensor failure.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state EC-technology probe\u003c\/strong\u003e — no float, float arm or moving part to jam or wear out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated temperature sensor\u003c\/strong\u003e — reads to ±0.1°C, logged alongside the ReefATO+ system's water-level data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine direct-fit replacement\u003c\/strong\u003e — plugs in in place of the original sensor with no reprogramming step.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeeds the leak-detection logic\u003c\/strong\u003e — on the full ReefATO+ system, the same probe technology underpins the leak alarm as well as top-off switching.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eSolid-state (EC technology) titanium water level and temperature probe\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\u003eFits\u003c\/th\u003e\n\u003ctd\u003eRed Sea ReefATO+ system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eBA8847\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable as a genuine spare or replacement sensor for any Red Sea ReefATO+ unit. Red Sea has not published whether this sensor is interchangeable with the separate ReefControl ATO Module's digital level and temperature sensor — the two systems use similar solid-state probe technology but are documented and sold as distinct parts, so cross-fitment isn't confirmed. If you're running ReefControl rather than standalone ReefATO+, check with us before ordering.\u003c\/p\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eRinse the probe tip periodically to clear salt creep or biofilm that can affect the level reading, and confirm the sensor is seated fully in its magnetic bracket after any maintenance that disturbs the sump.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by Red Sea's manufacturer warranty, which applies in addition to your consumer guarantee rights under Australian Consumer Law. Ships as a small parcel item.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWill this fit my ReefControl ATO Module instead of ReefATO+?\u003c\/h4\u003e\n\u003cp\u003eWe can't confirm that from Red Sea's published documentation — the two systems carry different part numbers even though the sensor technology is similar. Ask us to check before ordering if you're running ReefControl.\u003c\/p\u003e\n\u003ch4\u003eDoes replacing the sensor mean redoing the ATO calibration?\u003c\/h4\u003e\n\u003cp\u003eNo. It's a direct plug-in replacement, though it's worth watching top-off behaviour over the first day to confirm it's reading correctly.\u003c\/p\u003e\n\u003ch4\u003eWhat usually causes a ReefATO+ sensor to need replacing?\u003c\/h4\u003e\n\u003cp\u003eSalt creep, biofilm build-up on the probe tip, or physical damage during tank maintenance are the common causes of an unreliable reading.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reefato-magnetic-ato-sensor-mounting-bracket\"\u003eReefATO+ Magnetic ATO Sensor Mounting Bracket\u003c\/a\u003e — holds the sensor at a consistent, repeatable height.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":55242299408675,"sku":"BA8847","price":63.5,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/reefato-ato-sensor-43138263941411.webp?v=1790233227","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/reefato-ato-sensor","provider":"Nicks AOT","version":"1.0","type":"link"}