Simple BlackWater Monitor

[Tupaia]

Originally Posted by Madehn

tank tender uses a system with air pressure to measure tanks- they are not cheap but last forever and the people that have them like them- a lot. i use one gauge to measure two water tanks, blackwater tank and fuel tank-- they require putting one fitting on the top of the tank and running a small plastic airline to the gauge (line is the size of a pencil lead). no electricity,. no sensors to go bad etc-- neat little system.

Tank Tenders are excellent but expensive. If it is just 1 tank you can build your own it is just simple physics. Thin vertical tube inserted into tank, low pressure gauge (can be quite expensive but cheap ones available - ebay, ali express) a small syringe or blood pressure bulb as air supply.



https://www.instrumentationtoolbox.c...for-level.html

[Mirage35]

Experience in any case helps reduce the stress here. I have an electronic monitor that works pretty well, but what I've really learned is that 8 person-days on the boat = full holding tank. That's what I use for planning and management purposes; the monitor is now just confirmation.

[gonesail]

you could always install an inspection port on top of the tank .. open and see what the level is. open and close quickly

[Tupaia]

Originally Posted by gonesail

you could always install an inspection port on top of the tank .. open and see what the level is. open and close quickly

Requires a nose peg and a strong stomach.