Casella CEL-633 Real-Time Octave Band Analyzer

Casella CEL-633 Brochure

Casella CEL-6737 Outdoor Protection
System Brochure

Casella CEL-63X Model Comparison
Operation Manual

Casella Insight Software

Casella 633 Real-Time Octave Band Analyzer Type 1 $168.75 $393.75 $1,125
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Casella 633 Real-Time Octave Band Analyzer Type 2 $146.25 $341.25 $975
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Casella CEL-6737 Outdoor Enclosure Protection System $67.50 $157.50 $450
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Casella 633 Real-Time Octave Band Analyzer

Noise measurements from complex sources require a complete knowledge of the variable noise climate over an extended period of time. The CEL-633 model is designed to satisfy this need by providing overall, periodic and profile time history recording to suit almost any industrial or environmental measurement requirement.

A super wide 120 dB dynamic range means that the user does not need to worry about selecting scales as the meter will always be on the right range. The provision of all the popular frequency and time weightings simultaneously allow many different noise measurements to be taken by new and experienced users alike. The full-color, high-precision, graphic LCD enhances the user experience with this new meter. Audio recording is possible.


  • Wide dynamic range from 20 to 140 dB on single span
  • A, C and Z simultaneous frequency weightings
  • Slow, Fast and Impulse rms. time responses
  • Large 240 x 320 pixel color ¼ VGA graphic display
  • Easy to use menu structure
  • Optional data logging capability (model specific)
  • Regular timed or event triggered recording possible (model specific)
  • Available in ANSI/IEC class 1 and class 2 accuracy
  • Available with real time octave & 1/3 octave band filters plus 3 broad band results A, C & Z
  • Storage of all results simultaneously in a huge non-volatile memory
  • Period and time history profile recording
  • Noise event recording

Casella 6737 Outdoor Protection System

The Casella CEL-6737 Outdoor Protection System allows you to use the CEL-633 outdoors for medium to long-term noise monitoring. The microphone capsule is protected from direct rainfall and wind because it is positioned under an acoustically transparent rain shield.


  • Medium- to long-term protection of the microphone and preamplifier
  • Open design prevents the system from becoming waterlogged
  • Windshield is easily removable to allow microphone calibration
  • User can replace windsock and bird spike assembly
  • Can be supported horizontally or vertically by standard ¼” Whitworth thread
  • Nickel-plated brass for main assembly
  • Stainless steel bird spikes and tripod bracket