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SPRn Sound Velocity Transducers


SPRn sound velocity transducers – Measuring principle

The sample flows perpendicular to a sound signal. The speed of sound is measured between a transmitter and a receiver and temperature compensation is achieved using an integrated Pt 1000 temperature sensor.

SPRn 4115/SPRn 4215 Sound Velocity Transducer

  • Typical applications: original extract of beer, purity of liquids, interface detection, concentration of bulk chemicals, etc.
  • Inline installation, fork-type sensor
  • Material (wetted parts): Stainless Steel 316 Ti, gold plating, Hastelloy C276 or Monel 400
  • L version (long shaft 100 mm) for installation in tanks
  • Gold coating for sulfuric acid applications
  • 2T sensors: stable measurement values at production stop, high gas bubble tolerance
  • 2S sensors: stable measurement values despite coating build-up

SPRn 4214 Sound Velocity Transducer

  • Typical applications: concentration determination of wort chemicals, refrigerants
  • Bypass installation, tube-type sensor
  • Material (wetted parts): Hastelloy C276
  • LS version for samples with low sound velocity, e.g. freons






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