Output from capacitiv soil moisture sensor

anonymous 2020-07-02 19:37:41 2691 Views5 Replies
Hi,
I have connected a sensor with 4.5 V power source and I read the voltage between the green wire and 0 V. I get about 0. 170 V no matter if I put the sensor in water or air.
That is not correct - I would expect a much higher value (close to 3 V) when I have the sensor in water? How should I do it?
best regards
torben

2020-07-07 23:20:48 Hi,
I feel a bit embarrassed - it is so simple.
The 4.5 V come from 3x1.5 V batteries (between Red and Ground) and the 0.170 V is what I measure (between Green and GND) no matter whether the sensor is in water or in air. What am I doing wrong?
best regards

-------------------
------- ---------------------------- Green
- - ---------------------------- Red
------- ---------------------------- GND
-------------------

I could not attach a pdf-file, nor a ong-file. I hope the above sketch will do.
best regards
torben anonymous

2020-07-03 19:24:23 Hi,
I did not use a computer. I simply connected the sensor to a 4.5 V power supply and then measured the voltage between the green wire end 0 V.
best regards
torben anonymous