Multi-Channel Water Level Expansion

The Reef Angel Water Expansion Module will let you monitor your sump or display tank water level and give you a precise indication that you can use to turn on/off your equipment.

Example of things you could do:

  • Implement an ATO. No more mechanical float switches that can be easily tampered by a simple snail
  • Shut off return pumps to avoid overflow
  • Shut off ATO pumps to avoid them running dry
  • Implement an Automatic Water Change
  • Alert you of any abnormality that can be found by monitoring the level of water



  • Pressure sensitive sensor (No mechanical sensors or moving parts)
  • Up to 18″ of range
  • Uses any standard 1/2″ PVC pipe to measure the water level


Note: Only one expansion module can be connected to your system without an Expansion Hub.


Out of stock


  • Multi-Channel Water Level Expansion
  • USB cable for controller connection
  • 4x pipe adapters

Limited Two-Year Warranty

Reef Angel products are warranted against defective materials or workmanship for two years from the date of original purchase. Proof of purchase is required. This warranty does not apply if, in the judgement of Reef Angel, the product fails due to damage from shipment, handling, storage, accident, abuse or misuse, or if it has been used or maintained in a manner not conforming to product’s instructions or has been modified in any way.


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