# Capacitive moisture sensor Patent Number: US5402075A This patent introduces a capacitive moisture sensor, whereby spaced capacitive sensor conductors can detect moisture bridging the gap between them. There are 25 claims made in this patent, which centre on this being an "improved moisture sensor". It is claimed to be simple, reliable, accurate and highly sensitive. This patent will not interfere with the SoilSense-9000 as the soil moisture technology is different, requiring an AC current. The moisture sensor in the SoilSense-9000 is based on an operational amplifier and thus the technology is different, meaning no patent infringement can happen. ## References 1. [Capacitive moisture sensor](https://patents.google.com/patent/US5402075A/en?q=(capacitive+moisture+sensor)&oq=capacitive+moisture+sensor) 2. ~\citelu1995 # Footnotes