Red Sea ReefSense ATO Sensor

The Red Sea ReefSense ATO Sensor is a slim digital auto top-off sensor for the ReefControl ecosystem. It uses solid-state EC technology with a titanium probe to track your water level with no moving float switch to stick or fail, and a built-in digital thermometer reads tank temperature at the same time.

Connect it to a ReefControl Lite or Pro controller for automated top-off with real-time monitoring, notifications and logs in the ReefBeat app. Browse the full saltwater range at Squeaky's Aquatics.

Why You'll Love It

• No float switch: solid-state EC water-level sensing on a titanium probe means no moving parts to stick, so top-off stays reliable.
• Level and temperature together: a built-in digital thermometer accurate to 0.1 degrees monitors tank temperature alongside water level.
• Plug and play: fully digital, so it fits any ReefControl port with zero programming.
• Smart automation: pairs with ReefControl Power to drive a DC pump, cooling fan or heater from live readings.

Specifications

Complete Your Setup

• ReefControl ATO Module & Temp Sensor, adds the DC pump, bracket and tubing for a full top-off
• ReefControl Lite Controller
• ReefControl Power 8
• ReefSense Single Probe Holder

FAQ

Does this include an ATO pump?
No, this is the level and temperature sensor only. For a complete top-off with pump, bracket and tubing, choose the ReefControl ATO Module & Temp Sensor.

Do I need a ReefControl controller?
To automate top-off, yes, connect it to a ReefControl Lite or Pro. Like other ReefSense sensors it can also be powered by the ReefSense USB Power Connector for standalone monitoring in ReefBeat.

Freshwater or saltwater?
Both. The sensor works in freshwater and saltwater systems.