SEN0204 non-contact liquid level sensor: detecting sensitivity level
nashmcd 2026-08-24 00:55:07 157 Views2 Replies I have the SEN0204 liquid level sensor, and I know I can adjust the sensitivity levels via “SET” button on the provided adapter board. What I can't seem to figure out, is if I can see what sensitivity level is selected. It appears that I can only guess at what the sensitiy level is, or is there a method I can use to reliably tell what sensitivity is selected?
There is a reliable way to identify the setting. The SET button cycles through four sensitivity levels. Watch the probe's LED after pressing SET. One flash indicates sensitivity level one. Two flashes indicate sensitivity level two. Three flashes indicate sensitivity level three. Four flashes indicate sensitivity level four. Therefore, you don't need to guess anymore. This project may also help: A Look at Capacitive Water Overflow Sensor
https://www.pcbway.com/project/shareproject/A_Look_at_Capacitive_Water_Overflow_Sensor_57fcad75.html
It explains the sensor's capacitive operating principle. It also covers sensitivity and practical installation considerations. That makes it useful for troubleshooting detection issues.
love.forcircuits put a container of known wall thickness under it and see if it triggers. Thicker walls need higher sensitivity, so you can work out where you are by trial.
Jason.Miao 