hi everyone
I am looking for a good solution for measuring the level of septic tanks and sewage.
Difficult working conditions, lots of sediment.
The sensor may be susceptible to clogging.
I found such sensors.
What would you recommend?
https://a.aliexpress.com/_EHRDwSh
https://a.aliexpress.com/_ExhGkZf
Best regards
Please post links to their datasheet. Alie sales links are not what forum engineers ask for.
I don't understand why the level would be different than the bottom of the outlet. Can you explain?
Normally septic tanks fill all the way up and the water overflows the tank into the leach field. Most of the time it would just read “full”
so it works according to the logical 0/1 principle.
I thought there was some sensor that could measure the level. Due to difficult conditions, it is difficult to find
Most septic tanks in Aus use a plastic float with a built-in tilt switch.
That being the type that need to be pumped into a transpiration field.
Seems you don't know how a septic tank operates. Or are you calling something a septic tank when it is not and is really something else?
Sounds more like a ”sump” or a “holding tank” and pump in the US. The septic tank is more of a settling tank to separate out the solids by gravity so the liquids can seep into the drain field. Sometimes the tank has a baffle or two to act as two settling tanks and keep any surface floating things out of the drain field.
Pumping a tank dry/low would just mix things back up and pass it all to whatever the next stage is.
Septic tanks as I know them take raw sewage from the commode etc, let the solids settle down and bacteria work on them. The surplus water is on the top and flows out to the septic field or wherever it is suppose to discharge to. In time they fill up and need to have the solids removed. For more information check up on a honey scoop.
The simplest thing would be to place the tanks on a scale.
Typically a few tons in weight and buried in soil or whatever…?
I’d think the ultrasonic method would be OK. But that AliExpress sensor seems expensive. Perhaps test the concept with one of the cheap Arduino types?
There are commercially available devices , have a look at those .
Bear in mind that the atmosphere above the “do dos” will have methane in it and as such there may be safety requirements for any device used - it may need to be certified for use in that atmosphere - check that out first !!!
Blowing up a tank could be a bit nasty especially if you have a fan running .
Using ultrasonic to measure the height of the sludge within the full tank might be difficult. The differences in density between the sludge and the clear is on the order of 2%. One temporarily chunky bit could easily cause a false alarm.
Here is another question that the OP needs to respond to. Do you own the property where the septic tank is located?
Seems to me that the subject by nature contains zero bullshit but by adding a few so called experts it suddenly becomes full of it.
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