The Holding Tank (freshwater and waste water) Monitors are a “Push to Read” system with 6 blue LEDs illuminating when fluid is present.   

The “in-tank” sender unit has stainless steel sensing rods that are custom cut according to the size, shape and dimensions of your tank.  

The systems are specifically designed for their specific use in freshwater or waste water conditions and should not be interchanged.

Click on the Waste Water Monitor or Freshwater Monitor page for more information.  The Product Video and Virtual Boat Show videos also provide a detailed overview on how the systems function.


Add a Vigilance Monitor to your Boat or RV tank

Electrosense Inc. manufactures the most advanced, yet affordable Holding Tank (Freshwater and Waste water) Monitors.  The Vigilance line of Holding Tank Monitors  (Freshwater and Waste Water) is designed for marine and RV use.

Our systems use no moving parts and very little power. Each sender unit is custom-made, not off-the-shelf. This means that we can provide accurate monitoring for irregularly shaped tanks like those built into the fiberglass hulls of boats. Systems are maintenance-free, easy to install, and durable.

Most systems on the market use float switches, which eventually break; or they use "stick-on" sensors on the outside of the tank, which can easily be fooled into false readings by buildup on the inside of the tank's walls. Our sensors are all-electronic - no moving parts to break or get stuck. The displays can be powered by boat power or by a 12-volt battery, which means that you don't have to run any power cables. The only cable to run is the control cable between the sender unit and the display unit - we use Cat5 Ethernet cable for that, so all you have to do is plug it in - no crimping or splicing.

Water and Holding Tank Monitor Systems

Water Tank and Waste Water Monitors