The Neptune Systems Leak Detection Probe LD-1 is a flat leak detection probe to be used together with the FMM module. Plug this probe into your FMM and then place it underneath your carpet near your aquarium. Upon contact with water this probe will communicate to your Apex and alerts or other actions can then take place.

Note: The LD-1 will only work with the FMM and cannot be used with the ALD module.