Doppler Flow Detector

[brockrwood]

Took a picture of this gadget while accompanying my girlfriend on a visit to doctor’s office today.

This high-tech medical instrument is even cooler because of its retro, hobbyist look case and construction.

 

[bjphoenix]

We have something like that in the water line into our house. It measures our water usage and sends the information through cell signals to our city water department. We had a small leak in our sprinkler system and they could detect it.