New Image Gallery

Neptune Systems

APEX Optical Level Sensor with Magnetic Mount

4 items left

This sensor plugs into your FMM and, using reflected infrared light, will signal your Apex when it changes state from being wet to dry or dry to wet. This sensor can be used for constructing your own ATO (auto-top-off), as a high-level warning sensor in your sump, water storage level sensor, and much more. The sensors can be mounted on any type of reservoir that has up to 1/4" thick walls. 

  • Compatible with Neptune FMM Module
  • Magnet mounts to walls up to 1/4" thick
  • Can be mounted vertical or horizontal 

Note: FMM Module required for use.

1x OS-1 Optical Sensor with nut and washer

1x OS-M Optical Sensor Magnetic Mount

Customer Reviews
5 Based on 1 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
    Andre A.
    United States United States
    I recommend this product

    Great addition for redundancy

    Im used these as fail safes for high and low level water alerts in my sump and RODI storage container.I run my ato straight from my ro container in the garage and i just wanted to assure that if ever water in the container is low probably due to mixing the ato would shut off until the water level raises above the sensor.

    Customer Reviews

    Based on 1 review Write a review

    Welcome Newcomer