HYDROS Water Level Sensor (HDRS-LS-202H)

Automate and safeguard your aquarium with the Hydros Water Level Sensor. This reliable optical sensor detects when your tank needs top-offs or when a dosing container requires refilling, ensuring stable water conditions with precision and ease. Browse the full HYDROS collection for sensors, power bars and accessories that plug into it.

Why You'll Love It

• Accurate optical sensor monitors aquarium water level
• Ideal for ATO systems, dosing reservoirs, and overflow protection
• Connects to any Hydros Sense Port (Control 2, Control 4, etc.)
• No external power source required
• Compact and durable design for both saltwater and freshwater use

Specifications

Recommended Pairings

• HYDROS Launch, HYDROS Start or HYDROS Blenny, controllers with open Sense Ports
• HYDROS Sense Port 9 ft Extension Cable, when the sensor has to reach across the fish room
• HYDROS Triple Optical ATO Kit, level sensing and top-off in one package
• HYDROS Leak Detection Sensor and Magnet Mount Temperature Sensor, the other everyday HYDROS sensors

FAQ

Can this be used for ATO systems? Yes, it’s ideal for automatic top-off and refill applications.

Is a power adapter needed? No, it connects directly to a Hydros Sense Port without additional power.

What controllers are compatible? Works with Hydros Control 2, Control 4, and similar devices.