WS-1 water sensor

[Ezink]

Hello everyone,
I used to work quite actively with electronics design, so I even feel a sense of shame when asking, but I don't understand how the WS-1 water sensor works. It has two wires, red and black. I want to connect 10 sensors so that when one of them is triggered, the relay switches from NO to NC. I will design the further logic, but it is not clear to me how this sensor works and how to connect it. Maybe someone has experience with this WS-1 sensor and could you share a schematic of how to connect it?

[ataradov]

The sensor seems to take +24 V power and has plain relay output with 3 contacts - Common, Normally Open (NO), and Normally Closed (NC). When there is no water detected, Common and NC are shorted. Once water is detected, Common and NO are shorted.

If you want any of the 10 sensors to trigger the relay, then you can connect all commons and NO in parallel. If any of the sensors triggers, it will short the parallel connection. You can use that to power your secondary relay. Or just use the signal directly.

[Ezink]

Thank you for replay, but incorect. As I mentioned, it have 2 wires, red and black, thats it. It looks like this:

[pcprogrammer]

Hi Ezink, welcome to the forum.

I found two versions of WS-1 on the net.

The Asurity® WS-1 Wet Switch® Flood Detector, which has a relay build into it and can be connected as ataradov wrote.

And the TANE WS-1, which has only two wires, which you wrote. This one I suspect works with a difference in current. When no water is detected it draws only a small amount, and when it detects water it will draw a bit more. You can experiment with it when you have one. Take a 12V power supply and connect the sensor with a resistor in series. Lets say 1Kohm. Measure the voltage across the resistor when dry and when wet. You can then calculate the currents and design a circuit around it.

If this is the case you can wire them in parallel. When one or more get wet the current will go up.

Edit: @Ezink, I already wrote up my response  So just focus on the Tane sensor.