Ultrasonic sensores are also known as tranceivers. They are usually used to measure wind speed and direction.
There is some info at http://www.keyence.com/products/sensors/ultrasonic/ultrasonic.php. They are a manufaturer of them.
The most likely cause. The ultrasonic sensors have picked up air movement in the cars interior.
Ultrasonic anemometers are now being used in the field.
All sorts of bad things but picnics would be nice.
What?! Trace ultrasonic waves? Are you one hundred per cent cuckoo?! Why would anyone trace ultrasonic waves these days??
An ultrasonic thickness gauge is required for measuring the thickness of different types of materials. The best ultrasonic thickness gauge you can buy is the Defelsko Corporation Ultrasonic Thickness gauge.
I would try searching on Wikipedia - they have lists of all sorts of things.
Usually oxygen sensors are what would be screwed into the exhaust manifold.Usually oxygen sensors are what would be screwed into the exhaust manifold.
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plant flowers, the peasant children would run and play, they would farm, milk cows, all sorts of things like that :D
You would probably wind up on the street, forced to do all sorts of terrible things in order to survive.
Yes, many. force sensors, suitably arranged would do, so would pressure sensors. The simplest would be a spring with a pointer to measure displacement.