Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of 
@kryan
Active 6 years, 7 months ago-
kevin ryan posted an update in the group Researchers 6 years, 9 months ago
I am searching for recommendations and resources to construct a low-cost ultrasonic water level sensor for use with trapezoidal flumes on small streams
-
kevin ryan became a registered member 6 years, 9 months ago
Hi Kevin, we are using and like the sensors from Maxbotix. Here’s an old blog post by @shicks to see one compact enclosure option: https://envirodiy.org/ultrasonic-water-depth-sensor/.
(the forum limits how many links I can give you, so this will come in several posts)
https://www.maxbotix.com/Ultrasonic_Sensors/MB7389.htm has a range of 30-500 cm.
https://www.maxbotix.com/Ultrasonic_Sensors/MB7386.htm has a range of 50-1000 cm.
https://www.maxbotix.com/Ultrasonic_Sensors/MB7955.htm makes temperature compensation integrated with the MaxSonar (and there’s a solder it yourself kit for 1/3 cost).
Scripts are available in the modular sensor repo: https://github.com/EnviroDIY/ModularSensors
Also notable, we like to drill and tap plastic enclosures and screw the MaxSonar straight into the enclosure.
https://github.com/EnviroDIY/EnviroDIY_Mayfly_Logger/blob/master/hardware/1120Pelican_enviroDIY_5.pdf
Let me know if you have other questions.…[Read more]
I have a couple of high school students making a water-depth sensor with the MB7389 ultrasonic sensor and a Mayfly data logger. The information you posted has been very helpful. We are also using the Pelican 1120 case. The problem we are having is attaching the case/MB7389 to the top of the 4″ PVC pipe that we are using for a stilling well. Any s…[Read more]
Hi Kevin, I’m not sure about an elegant way to mount a pelican case to the pipe. My current cases are all pole mounted with two 10″ zinc mending plates mounted to the back of the Pelican case using bonded sealing washers to keep the case dry. Then the mending plates are mounted to a post in the ground. If you have only ultrasonic sensors on the…[Read more]
Thank you. I checked out the link, that is very nice. Right now we only have the ultrasonic sensor, but I wanted to add temperature sensors for water and air. In the future, we might add a rain gauge.
Kevin, I was just thinking, how about mounting a PVC end cap to the back of the pelican case (so the door of the case is on top) and drill and tap the PVC and case to accommodate the ultrasonic sensor? It would look something like the one linked above, but roomier. Then you have the case mounted as a sort of well cap and you have room to add…[Read more]