Environmental Monitoring Equipment & Supplies • Sales, Rental & Service by Enviro-Equipment — Charlotte, North Carolina USA

  • 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



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)


Duration 1s-24h

On/Off timers

6 sets with selectable times and a repeat function

Tripod mount

1/4” Whitworth socket


3x AA Alkaline, 10-15 hours dependent on back light

External power

9-14V DC at 150mA


332g including batteries


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


2GB (>1 year logging when set to 1 second interval, 999 runs). All parameters stored and accessible via Casella insight. Total measurement runs: 999.


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.


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