[C320-list] Holding tank monitor sensor

[John Meyers]

I installed a SeeLevel system last summer on the holding tank and forward
water tank. Because the holding tank is not a rectangle I had to do some
calculations and came up with a conversion table from the percentage the
gauge says to percent the tank has. Works great for me.

John Meyers
#406 1997
Muskegon, MI

Catalina 320
22 gal Holding tank conversion using a SeeLevel system mounted near the top
of the holding tank
Reading Actual
40% 25%
50% 38%
60% 50%
70% 63%
80% 75%
90% 88%
100% 100%

On Fri, Jan 15, 2021 at 5:02 PM John Frost <johncfrost at gmail.com> wrote:

> I have precisely the same situation on my holding tank sensor. And I had
> it on the first day that they delivered my boat in 2009 when the holding
> tank had never even been used.
> I attribute it to the positioning of the sensor, possibly too near the
> bottom of the tank. I "solved" the problem by putting a small label under
> the indicator that says "1/3 = empty".
> Works for me.
> I assume the right way to fix it is to unglue the sensor and raise it a
> bit.
> An alternative might be to disconnect the wire to the sensor to just not
> get a reading when the tank is low.
>
> John
> 2009 C320MKII
> Hull  #1118
> Lake Guntersville, AL
>
> -----Original Message-----
> From: C320-list <c320-list-bounces at lists.catalina320.com> On Behalf Of
> ROBERT MILLER
> Sent: Friday, January 15, 2021 3:45 PM
> To: c320-list at lists.catalina320.com
> Subject: [C320-list] Holding tank monitor sensor
>
> I have a tank monitor system for both fresh and black water, which has 3
> sensors installed on the outside of the tanks. On my holding tank the first
> sensor isn’t working anymore (it always reads 1/3 full even when the tank
> is empty). I suspect there is crud stuck to the tank wall which is causing
> it to read full, but there is no clean out on the tank. Has anyone
> encountered this problem and have a solution on how to clean the interior
> walls to hopefully remedy this issue?
> Thanks,
> Rob Miller
> Alchemy
> 1999 #571
>
>
> Sent from my iPhone
>
>