Stream Counters Based on Accoustic Phenomena

Position of echo-inspection zone determined from the pause between piezoelectric crystals transmitting and receiving modes. 

The Autometrics Corporation has developed a system for determining both solids concentration in a suspension and the avenge size of the fineparticles in a stream coun- 

By measuring the pressure fluctuations down the capillary pipe section of the instrument, Karuhn postulated that the mechanism producing the sound was as follows. The fineparticle entering the capillary section of the instrument penetrates the boundary 

---