This is an interesting sensor that I would like to use to keep my ROV at a certain distance from the ocean bottom. It’s only $30.00
Brief description:
"The LV-MaxSonar-EZ0 offers very short to long-range detection and ranging, in an incredibly small package with ultra low power consumption. The MaxSonar-EZ0 detects objects from 0-inches to 254-inches (6.45-meters) and provides sonar range information from 6-inches out to 254-inches with 1-inch resolution. Objects between 0-inches and 6-inches range as 6-inches. The interface output formats included are pulse width output, analog voltage output, and asynchronous serial digital output."
My project isn’t near this stage yet, but this is one of the sensors I would like to use.
Len
there’s a chance it might work if the moving part of the ranger is free to move unrestricted and is in direct contact with the water. I don’t know how you can do that with wax
But this gives me an idea, what if the ultrasonic transducer is housed in a small loose plastic bag filled with de-ionized water which is not conductive? the minimal density difference between normal water and the de-ionized water might still allow sound to travel. Although the bag might diffuse the cone shaped sound beam, but the transducer can also be housed inside a tube with an opening covered with a thin loose sheet of plastic which might retain the shape of the cone.
Or I could be talking outta my butt
If it’s clear water in a controlled enviroment, you can always use IR for ranging.
Ever heard of a protective wax coating?
In some model boards the recievers, servos and other electronics have a wax coating to protect the electronic. I’m not sure how’d you would do that, but i’m thinking that if cover the board but not the speaker, you’d have the waterproff proection on the board, and still have the sound emitted.
Unfortunately, this sonar is not submersible. We are currently working with our suppliers to bring submersible ultrasonic rangefinders to market. If you were to encapsulate them to make them waterproof, the sound waves would be blocked.
We do however offer an excellent selection of ultrasonic rangefinderson the RobotShop website, including the Maxsonar product line.
Consider these be Ultrasonic Ranging Modules for use in air (although they might have some applications in other environments) which we currently categorize as “ultrasonic rangefinders”. They go by many names in common usage, including sonar. This appears to be common practice among the respective robot sensor manufacturers and there are many variants in use. Our selection of ultrasonic sensors does not currently contain sensors specifically designed for underwater use. They are not to be confused with marine sonar technology. Thank you for communicating your interest.
