SNN0308 moisture sensor
Pétervári.László 2025-06-24 21:53:12 281 Views2 Replies Sirs,
I bought a waterproof capacitive moisture sensor SEN0308. I installed it and by a DMM I measured in the air 2,43 Vdc, in water 0,38 Vdc. How can I interpret these valiues into earth moisture?
Thank You!
2025-06-25 19:11:06 
ahsrab.rifat
For calibration, insert in Dry Soil (0% moisture)
Measure and record the voltage. Let's call it Vdry
Insert in Saturated Soil (100% moisture)
Saturate the soil (wet but not waterlogged), insert the sensor, and measure → Vwet. Don't use water directly for calibration, as it’s not representative of soil moisture. Use very dry soil and fully saturated soil.
ahsrab.rifat Pétervári.László
wrote:
2025-07-01 21:53:32 1 Replies
I've done the procedure. Do You know that this capacitive sensor has a linear characteristic? There is a quiestion mark in my mind, I've never seen linear capacitive sensor.
