Your region
Tel.  0845 680 0312
Home > Products > Sound Level Meters > CEL633C 1/3 Octave Sound Level Meter > Applications

CEL633C Environmental Sound Level Meter with 1/3 Octaves

cel633c environmental sound meter with 1/3 octave band filters
CEL633C Sound Level Meter


The CEL633C is a Sound Level Meter that includes the usual environmental noise measurement parameters along with real-time 1/3 octave band filters for tonal noise assessments. It also has a detailed Time History store, audio recording and automatic measurement timers.

  • Environmental noise measurements
  • Noise Ordinance and Community noise assessments
  • Noise in mixed residential and industrial areas - BS4142
  • Tonal noise surveys
  • Occupational noise measurements
  • Noise source identification

Due to the nature of environmental noise surveys (both the acoustic nature and the political nature) we recommend the use of a Class 1 sound level meter.

This meter includes all the Environmental noise parameters along with a detailed time history store and automatic timers, making it ideal for both short term and longer term assessments.

As most occupational noise regulations accept Class 2 as being adequate, all versions of the CEL633C are suitable for that application too. If you need to measure both environmental and occupational noise then this meter will do both.

Short Term Environmental and Community Noise Surveys

The CEL633C sound level meter measures the noise parameters that are needed by most regulations:

  • Periodic A-weighted Leq (the average sound level)
  • Ln Percentiles (the statistical values such as L10 and L90)
  • 1/3 Octave Band for tonal noise analysis

Noise Source Identification

Unattended noise measurement is convenient but causes problems when the time comes to identify the source of the noise. Was it a car, a strong gust of wind blowing the leaves or somebody shouting. The CEL633C can record the audio so that you can listen to the interesting bits, enabling you to make a positive identification of the noise source.

Please visit the Voice Notes and Audio Recording page for more details.

Long Term Environmental Noise Surveys

The addition of a detailed time history store allows for post processing and graphing the noise levels down to a resolution of 1 second, and the automatic timers make it easy to run repeating measurements (for example repeating 5 minute measurements in addition to the 1 second Time History).

The sound level meter can by mounted on a standard camera tripod, but if it is to be left unattended in poor weather conditions you will also need the weather protection offered by the Outdoor Kit.

Occupational Noise

The CEL633 is also suitable for the measurement of noise in the workplace:

  • Leq (average sound level) for LEP,d calculations
  • Peak for loud banging noise
  • "A" and "C" weighting for hearing protector evaluation
  • Octave band filters for detailed hearing protector evaluation


Class 1 Noise Meter with 1/3 Octaves
In stock
Kit with Meter, Calibrator and Case
In stock


Weekly Hire
Environmental noise kit with Sound Level Meter and Calibrator
More pricing information

CEL63x Range

Occupational Noise
From £1484.00
Occupational Octave
From £1962.00
Occupational 1/3 Octave
From £2738.00
Environmental Noise
From £2264.00
Environmental Octave
From £2741.00
Environmental 1/3 Octave
From £3517.00
noise at work sound level meter

Outdoor Kit

For measuring in poor weather conditions

More details...

How to Buy

Credit Card
Click the button or call 0845 680 0312.

Purchase Order
Or by fax: 0845 680 0316.

Information Request

Prices and Ordering

The Class 1 sound level meter is available alone or as part of a Kit, which includes Meter, Calibrator and Peli Carrying Case.

Order Code
Price (GBP)
excl VAT
Type 1 / Class 1 Advanced Integrating Sound Level Meter with 1/3 Octaves
In stock
Kit with CEL633C1 Sound Level Meter, Calibrator, Windshield, Peli Case
In stock
Insight Software for CEL620, CEL630 and dBadge
In stock


Telephone 0845 680 0312  
Home - Contact - Applications - Products - News - Rental - Calibration - Search - Help
Sound Level Meters - Dosemeters - Noise Warning Signs - Accessories - Secure Site