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Optimus Yellow - Sound Level Meter

The Optimus Range
Overview Measurement Using It Software Options    

The CR150 Optimus Yellow is a calibrated, professional grade sound level meter for noise measurements that must meet the relevant international standards. Despite being a powerful meter it is extremely easy to use, ensuring you get the correct measurements from the start.

  • IEC 61672 Class 1 or Class 2
  • ANSI S1.4, IEC 60651, IEC 60804 Type 1 or Type 2
  • Hi-res color OLED display for clear readings
  • Single span 20 to 140 dB
  • Voice tag recording of comments*
  • 12 year warranty


  • Basic noise surveys
  • Noise ordinance enforcement
  • Fire alarm testing
  • Machinery maintenance and trouble-shooting
optimus sound level meter optimus yellow sound level meters optimus red sound level meter optimus green sound level meter optimus purple sound level meter
optimus range of sound level meters

The Optimus range of sound level meters uses the latest display technology and digital signal processing (DSP) techniques to provide you with a very powerful yet easy to use meter. The ease of use comes from the fact that all parameters are automatically measured at the same time, so no need to think about what you need in the split second before starting the measurement.

Making Noise Measurements

Making measurements usually consists of checking the calibration (adjustments are automatic), recording a voice tag if required*, and then taking the readings.

If the data logging option is fitted then all the measurement parameters are stored, along with time, date and other relevant information.

More about the measurements...

example noise level displays

Future Upgrade

Not sure if you need data logging? Maybe you don't know at this stage whether you might need an Integrating sound level meter. It could even be that eventually you may need octave band filters.

All of these features can be added at a later date. Some can even be fitted without returning the meter to the factory by remote update.

We can even change the meter from Class 2 to Class 1, although of course it must be returned for this upgrade.

Visit the Options page for more details.

  Standards IEC 60651 & ANSI S1.4 Type 1 or Type 2
IEC 61672 Class 1 or Class 2
  Display Hi resolution graphic OLED with illuminated keypad
  Memory* 4GB expandable. Up to 10000 measurements stored
  Time History Store* 10ms, 62.5ms, 125ms, 0.5s, 1s, 2s (user selectable)
  Voice Tag* 30 seconds of audio with each measurement
  Physical & Power  
  Size 283 x 65 x 30 mm
  Weight 300g
  Battery 4 x AA Alkaline (typically 16 hours)
  External Power 5V via USB socket from PC or Power Supply
  Tripod Mount 1/4"
  Temperature -10°C to +50°C (storage -20°C to +60°C)
  Humidity Up to 95% RH non-condensing
  Acoustic Technical  
  Range 20 to 140 dB RMS - Single Range
  Noise floor <18dB(A) Type 1, <21dB(A) Type 2
  Freq. Weightings A, C & Z measured simultaneously
  Time Weightings Fast, Slow & Impulse measured simultaneously
    * With data logging option fitted
order codes
Optimus Yellow Order Codes
CR152A Type 2 Sound Level Meter $1074.00
CR152B Type 2 Sound Level Meter with Data Logging $1380.00
CR151A Type 1 Sound Level Meter $1994.00
CR151B Type 1 Sound Level Meter with Data Logging $2302.00

CR514 Type 2 Acoustic Calibrator $365.00
CR515 Type 1 Acoustic Calibrator $514.00
CK280 Optimus Carry Case

CU-USB AC Power Adapter $31.00
CU-CUSB Car Accessory Socket Power Adapter $26.00
Order Codes...
optimus yellow datasheet Optimus Yellow
Datasheet (PDF, 390k)


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