Neptune Systems OS-1 Optical Level Sensor V2

Overview

The Neptune Systems OS-1 V2 Optical Sensor is a reliable, long-lasting solution for monitoring liquid levels in your sump, mixing station, or reservoirs. Designed to plug directly into your FMM (Fluid Monitoring Module), this sensor uses reflected infrared light to detect changes between wet and dry states, making it ideal for a wide range of aquarium automation applications.

Key Features

• Reliable Level Detection – Solid-state optical technology ensures accurate wet/dry sensing.

• Versatile Applications – Use for ATO (auto-top-off), high-level sump alerts, storage container monitoring, and more.

• FMM Integration – Connects directly to Neptune Systems FMM for seamless Apex control and alerts.

• Durable & Long-Lasting – Designed for extended use in freshwater and saltwater environments.

• Easy Installation – Mount through a vessel wall with included nut and silicone washer or use custom brackets.

Product Specifications

• Model: OS-1 V2 Optical Sensor

• Connection: FMM port

• Detection Method: Reflected infrared light (wet/dry state)

• Mounting: Bulkhead-style with nut and silicone washer (included)

• Compatibility: Neptune Apex systems with FMM module

What’s Included

• (1) OS-1 V2 Optical Sensor

• (1) Fastening Nut

• (1) Silicone Washer