Casella CEL 63X Sound Level Meters

  • Single large noise measurement range, 20 to 140 dB.
  • Broadband, octave and third octave frequency measurements.
  • Meets IEC 61672 / 60651 and ANSI S1.4 Class 1 or Class 2.
  • Large internal memory for datalogging.
  • Statistical noise level measurement (Ln%) available.
  • Audio recording and event triggering.

The 63x Series sound level meters can be used for simultaneous measurement of all workplace noise parameters, as well as those required for environmental monitoring. With an intuitive design the meter is easy to use, with very little set up required.  The CEL-63X is ideal for environmental or occupational sound level monitoring.  Pre-configured setups are available for ISO, OSHA, and other standards - you can even program your own.  The CEL-63X can simultaneously measure all parameters with all frequency and time weightings.

There are 2 models available, please see the model selection table below for the one you require (e.g. CEL-632). Then select your frequency analysis requirements by adding ‘A’ for broadband, ‘B’ adds octave band and ‘C’ adds 1/3 octave e.g. CEL-632C. Then add your class, ‘1’ for class 1 and ‘2’ for class 2 e.g. CEL-632C1 for a class 1 instrument. Each instrument comes complete with a standard kit case, windshield and calibration certificate.

Model CEL-632 CEL-633
Cumulative Results
Period Results
Profile Results
Statistical Values (Ln%)  
Audio Voice Notes
Marker Events
Level Events  
External Events

P65 Warning

Measurement Range 20-140dB RMS (143.3dB peak)
Total Noise floor 19dB(A) Class 1, 25dB(A) Class 2
Time weightings Fast, Slow and Impulse simultaneously
Frequency weightings A, C and Z (un-weighted) simultaneously
Frequency bands
  • 11 Octave bands 16Hz-16kHz (B&C models)
  • 33 Octave bands 12.5Hz-20kHz (C models)
Amplitude weighting (Q) 3, 4 and 5 simultaneously
Back erase Last 10s in cumulative mode (all models)
Timers Duration 1s-24h
On/Off timers 6 sets with selectable times and a repeat function
Tripod mount 1/4” Whitworth socket
Batteries 3x AA Alkaline, 10-15 hours dependent on back light
External power 9-14V DC at 150mA
Weight 332g including batteries
Size 230x72x31mm inc preamp and microphone
Audio Recording
  • Low Quality: 8,000 samples/s @ 8bit (64kb/s), up to 4kHz
  • High Quality: 24,000 samples/s @ 8 bit (192kb/s), up to 12kHz
Memory 2GB (>1 year logging when set to 1 second interval, 999 runs). All parameters stored and accessible via Casella insight. Total measurement runs: 999.
Events 999 events/run. 10 hours of audio recording in high quality mode, 60 hours in low quality mode. For long term unattended monitoring the CEL-630 takes a new run daily for up to a total of 400 days.
Operating Conditions 0 to 90%RH (non condensing); -10 to +50°C (Class 1) and 0 to 40°C (Class 2); Atmospheric pressure of 65 to 108kPa.
Languages User interface can be changed via the menu: English, French, German, Spanish, Italian, Portuguese, Chinese.
  • IEC61672: 2002 Class 1 and 2, ANSI S1.4: Type 1 and 2 (1983)
  • Filters: IEC61260: Class 0, ANSI S1.43: (1996)
  • Note: IEC61672 replaces 2 obsolete standards, IEC60651 and IEC60804