www.iFourWinns.com

Has anyone seen this? http://levelguardproducts.com/marine-rv ... onitor.php

They make different verions too. There a littler cheaper.

While both are external mounted, their method of determining tank level is very different. The Level Guard uses 3 or 4 (depending on version) external sensors to determine 1/3, 2/3, Full or 1/4, 1/2, 3/4, Full levels. Depending on how well you place the sensors, determines how well it reads. This could actually be a benefit if you have an oddly shaped tank and place the sensors based on actual measured volume. The iSeries uses foil tape that travels the full height of the tank and measures the conductivity between two strips - this essentially gives you smaller increments and shows you the current level in %.
If cost is a concern, Tank Edge also has a 3 tank model that sells for $135 - it uses the same sensors, but the display is only in 1/4 tank increments.

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1969 Chris Craft Commander 47
1999 Four Winns 328 Vista - SOLD

Update: The local electronics guy quoted $1500 for a new sensor system, plus 8 hrs labor at $120 per hour to fit three tank gauges and senders

Too steep for my budget, so after a lot of research, I settled on WEMA analogue gauges and did it my self for under $250 and three hours work. I noticed some places in the U.S. had the Wema gauges for as low as $29 and the senders for $40 - but the vendor didn't use air-freight - and I sea-freight to OZ take about 7 weeks. !

Things I like about the Wema analouge setup;

• TheWema gauges fit exactly in the holes of the old Xintex units,
• I could use the existing single wire run to each sensor
• You see the exact tank levels, not only quarterly movements as some other systems.

I used one gauge for the holding tank, and shared one gauge for the Fresh / Grey water, using an double pole throw switch to select between Fresh & Grey water senders.

The Oz supplied senders only come in 1 1/4 inch BSP fitting, but the original senders were 1 1/2 inch NPT. So I used the thread from the old senders and epoxied the new senders into the old threads. (U.S. Wema senders are NPT)

Works great ! - the only issue is I'm sure that my boat has some sort of grounding issue - when I turn on any pumps or reduce the voltage in any way, the gauges will under-read by around 20% - but that's only temporary.

Very satisfying fixing something yourself

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Wayne R.
2006 Vista 378 - "AeroNautical"

And considering the quotes ya got for work from the marina, very satisfying on the wallet too!

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1996 205 Sundowner DLX
5.0FL Volvo SX Cobra
Tow Veh: 2012 Nissan Frontier Pro-4X