How to measure the liquid flow rate ?

[waduk]

Combinator based obviously,
I'm thinking about pulsed based, read the amount from tank on the first cycle, then stored that X signal value somehow. The next cycle is the same, store as Y value. Substract the values, divide by the ticks, there you have it.
But i'm not smart enough to came up with setup to measure this.
Is it possible ?

[Chess]

First you need a clock, and arithmetic combinator that adds 1 to the input and outputs his signal to a decider combinator. The decider combinator compares the input (the count) with 30, if less than 30 outputs the input and if equals to 30, outputs 0. The output of the decider goes to the aritmethic creating a cycle that counts to 30 and resets (thats 1 second, but you can use any other value).

Now you conect your store tank to 2 new decider combinators. One that let the signal go throw when the clock is equal to 0 and the other when is equal to 30.

The measure at 0 time should go to a memory cell (there is a post in the forums that explains how to build one). The measure at 30 goes to an arithmetic than sustracts him the value of the memory cell and the result is stored in a new memory cell. That is your current flow per second.

(Sorry i can't post a picture but i can't load the sandbox mode for some reason...)

[waduk]

Thank you so much, but i'm having a hard time deciphering what you wrote
Especially with combinator input/outpot setting, which one goes to which.
I know it's asking much if you can provide pic, but blueprint would be really helpful.

I'm actually learning about combinator not from reading Combinator 101 from Gopheratl post, but from his provided blueprint sample.
Not native english.