NPN Non-contact Liquid Detector with Tractor Bracket

[@skinkebuen]

mA is not power. It is current. What you loose over distance in voltage to the relay. The lower the current is, the lower the drop in voltage is. Great ide, and I like it. I ran into this video because I am looking for some way to measure level in a fuel tank. To bad these don`t work on a metal container.

[@pikadroo]

I have found these sensors to have difficulties in areas with a lot of electromagnetic disruption around them.

[@rhortiguela]

I have a question. Do you know how to connect and use the black wire for sensor sensitivity setup?

[@thiagovania2426]

Thanks for the video. could you please add to the video (or comments) the pinout you used to connect the relays? I need to know when there is no liquid in a container.

[@pandrews255]

Sure, pin-out added to the video notes.

[@ayginnaderi6764]

Does it need any calibration? can we use it for a permenant case for a long time?

[@pandrews255]

The way I'm using it, there is no calibration. I wouldn't use it outside without putting some silicon around it.

[@jameelsheik]

I had seen this water sensor in Chinese e-commerce AliExpress. Can u tell me where to connect Black wire of sensor. Brown wire = positive (5-24v) Yellow wire = output ( positive output when water is senses) Blue wire= ground Black wire = ??? I had asked the Chinese seller but English in China is terrible. I can't understand their English.

[@pandrews255]

My notes have this as follows: Brown: +5V Yellow: Signal/Out Blue: Ground I didn't find a use for the black wire. Hope this helps!

[@ShedOfDreams]

Black wire to a suitable pic. Then from that you could operate relays to turn on practically anything!

[@pikadroo]

black wire is the sensor select line. so if you have more than one you can select between them. Say you are running the unit on 5 volts. When the wire is tied to ground (-5v) the unit is active, when it is tied to positive voltage (+5v) the unit is not active. So this way, say if you are using a micro controller you don't need to use but a single analog pin. However, you will need a way to enable and disable all those separate lines but there are port digital pin extension that can take care of that.

[@va3spt]

Do you have a rough schematic of this circuit?

[@pandrews255]

Sure, I found the schematic for the reset circuit here: www.boatdesign.net/threads/buzzer-mute-button.47881/#post-643984

[@va3spt]

@@pandrews255 Thanks for the schematic. Which Omron relay did you use?

[@va3spt]

Sorry I just saw the parts list up above, thanks.