I have a 5.000 liter water tank in my garden that I would like to measure using a ultrasonic sensor and my Raspberry PI. The termporary hardware setup was easy and also the software implementation was totally fine. So the tests that I made were all succesfull.
In my test setup the wiring was only temporary and in the final installation I need to lay the cable in the ready existing cable channel that is in the ground.
My problem ist that I was not able to get the pull wire completely into the cable channel - maybe there is a tight rounding in the cable channel that dissallows me to get through.
By this fact I was pretty annoyed the last weekend - but I need to find alternatives.
The Idea:
Control the Ultrasonic Sensor locally with an Arduino (which is much more lightweigth than the raspberry) - both placed in the water tank, run the Arduino with a battery and transmit the data via wireless lan or via a 433MHz link to the raspberry.
I would only place the sensor in the water tanks and all the other electronics outside as water is corrosive.
Be aware that in a water tank the relative humidity is high, which affects the speed of sound of the sensor.
So make some reference measurements with the sensor (use a stick to get the factual value) to create a lookup table.
Then interpolate in the table to get a quite reasonable measurement.
If you check the sensors subsection you will find more water level measurements tools and sketches (upper right is a search box)
To keep the Arduino close by why not use a project box? The sensor could be mounted on the outside of the box while the Arduino could be protected inside of it.
sonnyyu:
We have an other thread talk about water level measurement;-
The method is discussed at thread:
Ultrasound
Pressure sensor
X band Proximity Sensor
Ku band Proximity Sensor
K band Proximity Sensor
Sound
315MHz/433MHz rf-link Arduino (radio waves blocked by water)
Bluetooth Proximity Sensor
VLF radio waves (3–30 kHz) (radio waves through by water)
Laser-based water level sensor
Capacitance proximity sensor
Resistance proximity sensor
Measurement the pump discharge pressure (if there is pump)
Float switch
Thanks for your replies!
The intention of my question is more to get an idea if it is possible
to run the arduino (in a completely waterproof box) with batteries
transmit via wirelesslan when the sensor is in a water tank that is outside burried in the ground and covered by a lid of steel a. How about the range? Is Wireless lan okay? Or would you prefer another link?
to run the arduino (in a completely waterproof box) with batteries
Yes, Underwater Enclosure IP68.
transmit via wirelesslan when the sensor is in a water tank that is outside burried in the ground and covered by a lid of steel a. How about the range? Is Wireless lan okay? Or would you prefer another link?