Hi , good afternoon.
Unfortunately no they dont make such a sensor. But...you can use a good quality depth finder with sonar for this.
You want one that has high resolution so you will be able to make out what appears to be at the bottom.
Funaro does sell a few of these as does Lowrance I would stick with these two manufacturers because they are high quality made and reliable as well;-)
It also depends on the water depth you will be working in. But most of their units wiil do a pretty good job of this.
I may be able to recommend one for you if you need?
Please let me know on that.
But you can web search these or visit a good sporting goods store like Cabelas or Dicks, for something like that to find one you like.
In any case, I will stick with you until this is complete.
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Thank you and have a great weekend!