Integrating sound level meter for occupational safety and environmental protection
with octave analyzer
PTB model regisration 21.21 / 10.01



  • Compact, robust design
  • Easy operation
  • Single, wide measuring range
  • High-resolution colour display
  • Real-time octave band analysis
  • Simultaneous measurement of all occupational noise parameters according to ISO 9612
  • Instrument menu in 6 languages
  • Pre-defined and user-selectable configurations available
  • Automatic calibration function
  • Long battery life
  • DC level output


  • Evaluation of occupational noise exposure
  • Hearing protection selection
  • Noise exposure calculation
  • Ensures compliance with the occupational noise standards and regulations

The CEL-620 is available as IEC61672-1 Class 1 or Class 2 sound level meter. It comes with complete accessories, including sound calibrator, carrying case, wind screen, user manual and USB cable.

casellasolutions.com The sound level meter provides the means for octave band frequency analyses (16Hz – 16kHz). The analysis is performed in real time with a measuring range of 140dB. Therefore it is not necessary to change the measuring range. The CEL-620 sound level meter is equipped with a USB interface. Stored data may be exported in a Microsoft Excel-editable format. Alternatively the data may be downloaded with the Casella Insight software.


CEL-62X version overview
Version Order no. Features
CEL-620.B1 SLM type 1 PTB 801460.6 Class 1 sound level meter, octave analyzer, accessories: carrying case, wind screen
CEL-620.B2 SLM type 2 801196.6 Class 2 sound level meter, octave analyzer, accessories: carrying case, wind screen
CEL-120/1 Class 1 calibrator 801391.0 Class 1 calibrator, 94/114dB
CEL-120/2 Class 2 calibrator 801217.1 Class 2 calibrator, 114dB

Standards and approvals


IEC 60804: Class 1 sound level meter

IEC 61672: Class 1 sound level meter

ANSI S1.4 - 1983 (R2006): American National Standard - Class 1 sound level meter

ANSI S1.43 - 1997 (R2007): American National Standard - Class 1 integrating-averaging sound level meter

IEC 60651 - 1979: Octave band filters (CEL-620B model only)

IEC 61260: Class 0 filter

ANSI S1.11 - 2004:

American National Standard - Filters of class 0


DE Germany
PTB type approval 21.21 / 10.01


casellasolutions.com The Casella Insight software allows the comfortable management of data and includes a report feature.
For further information please refer to CASELLA INSIGHT.

Technical specifications

General technical specifications of CEL-62X
Accuracy Class1 or Class 2 according to IEC61672, IEC61260 Class 0, ANSI S1.43, IEC60651 and ICE60804
Measuring range RMS 20...140dB, peak 143dB
Measurement values LXY, LXYmax, LXYmin, LXeq, LXpeak, Lavg, LC-LA, LXIeq, LTM3, LTM5, LAE

1/1 octave bands: LXY, LXeq, LXYmax

Where X is the frequency weighting A, C or Z and Y is the time weighting Fast (F), Slow(S) or Impulse (I). All weightings are measured simultaneously.
Frequency weighting A, C, or Z
Time weighting Fast, Slow, Impulse
Microphone 1/2" measuring microphone, permanently polarized
Operating time 11h (20h without backlight)
Interface USB


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