Components and supplies
Small Guage Wire for DC Applications.
Pocket Solder- 60/40 Rosin Core 0.031" diameter
Arduino Nano R3
5 V DC, 500 mA Power Supply
Resistor 1k ohm
USB-A to Mini-B Cable
5 mm LED: Green
Heat Shrink Tubing, Assorted Sizes
Solu SL067 Water Sensor
Tools and machines
Heat Gun
Soldering iron (generic)
Apps and platforms
Arduino IDE
Project description
Code
Downloadable files
Water Level Monitor Schematic
Image of system schematic.
Water Level Monitor Schematic
Comments
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Anonymous user
2 years ago
I have the experience that these kinda sensors oxidize very fast. This is mainly because they are constantly powered. Although the DC current through the (wet) sensor is very small, still oxidation is gonna happen when it is in wet conditions during long times. A trick might be to only "switch" the sensor on, a few (milli)seconds before actually doing the measuring and switch off as soon the measurement is done. Working this way, oxydation will still happen, but it will take MUUUUCH longer before you have to install a new sensor. Because I think that this sensor does not consume more than 40mA, the +5V of the sensor can be connected to a digital output of the Arduino. The output of the arduino will not be exactly 5V, so a "re-calibration" will be necessary.
NewMC
2 years ago
Thanks for the recommendation. I'm currently running the sensor for 4.5-5 hours/day (when we're home and active). I am concerned about it not lasting more than a few weeks due to oxidation, and will look at doing as you suggest. Thank you!
Anonymous user
2 years ago
Excellent ! Nice work and explanation. Thanks for the note about the oxidation!
Anonymous user
5 years ago
Buenas yo intenté hacer un pluviómetro con este sensor, sin embargo una semana después ya se había oxidado(carcomido) debido a que hubo precipitación y el sensor estuvo expuesto por varios días al agua que se depositó, recomiendo usar el sensor ultrasonido para no tener estos inconvenientes.
PaulVdB
6 years ago
I have the experience that these kinda sensors oxidize very fast. This is mainly because they are constantly powered. Although the DC current through the (wet) sensor is very small, still oxidation is gonna happen when it is in wet conditions during long times. A trick might be to only "switch" the sensor on, a few (milli)seconds before actually doing the measuring and switch off as soon the measurement is done. Working this way, oxydation will still happen, but it will take MUUUUCH longer before you have to install a new sensor. Because I think that this sensor does not consume more than 40mA, the +5V of the sensor can be connected to a digital output of the Arduino. The output of the arduino will not be exactly 5V, so a "re-calibration" will be necessary.
NewMC
2 years ago
Thanks for the recommendation. I'm currently running the sensor for 4.5-5 hours/day (when we're home and active). I am concerned about it not lasting more than a few weeks due to oxidation, and will look at doing as you suggest. Thank you!
Water Level Monitor | Arduino Project Hub
milespeterson101
a year ago
No photos??