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General project discussion / help
Did you make a robotic coffee pot which implements HTCPCP and decafs unauthorized users? Show it off here!
By aaronik19
#196366
Dear All,

Is it possible to use the Ultrasonic Sensor - HC-SR04 to sense product material which is passing through a stainless steel pipe to avoid drilling this pipe to insert capacitive sensor? Can Ultrasonic Sensor - HC-SR04 pass through the stainless steel material?

Thanks for your reply and help
By jremington
#196372
No. Sound waves just reflect from the pipe surface, regardless of what is inside the pipe.

A microphone might be able to detect the sound of material passing through the pipe.