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Optimus Green - Environmental Sound Level Meter

The Optimus Range
Overview Measurement Using It Software Options    

The Optimus Green is already optimized for environmental noise surveys and so is adequate for most surveys without any additions.

The following decisions do need to be made

  • Type 1 or Type 2? - The most popular for environmental work is Type 1.
  • 1/3 Octave Bands? - For more detailed frequency analysis.
  • High Noise Levels? - Option to measure up to 170 dB.
  • Accessories? - Calibrator is essential, carrying case is useful.


Sound Level Calibrator

sound level calibrator

The most important of the accessories is the Calibrator. Most regulations state that you should use one to check the function of the meter before making any measurements.

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

Type 1 or Type 2?

A Type 1 sound level meter is a little more accurate than a Type 2 model. It is also more expensive. For most environmental noise measurements we recommend the use of a Type 1 meter, which gives better performance at higher frequencies and certainly looks better when presenting the results for legal purposes.

If you want a bit more information then please visit our FAQ page about Class / Type.

1/3 Octave Band Filters

The Optimus Green comes with real-time 1/1 Octave Band Filters. However, for more detailed analysis the meter can have real-time 1/3 Octave Band Filters fitted.

1/3 Octave Band Centre Frequencies:

Hz 6.3, 8, 10, 12.5, 16, 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250,
315, 400, 500, 630, 800, 1000,1250, 1600, 2000, 2500, 3150, 4000, 5000,
6300, 8000, 10000, 12500, 16000, 20000

The bands 12.5Hz to 20kHz are displayed on the Optimus screen. The additional bands (6.3Hz, 8Hz and 10Hz) are stored and displayed after download.

For more information please visit out FAQ page about Octave and 1/3 Octave Band Filters.

  1/3 Octave Band Leq  
  12.5Hz 20kHz  
  The Optimus Green stores
6.3Hz to 20kHz 1/3 Octaves

Weatherproof Outdoor Kit

The Optimus Outdoor Noise Measurement Kit is ideal when you need to leave the meter unattended in poor weather conditions. The sound level meter itself is not weatherproof and will be damaged by rainfall.

The Outdoor Kit includes a weatherproof carrying case, outdoor microphone system and a battery pack to offer at least seven days of measurement. An optional extra battery pack will give up to forteen days of noise measurement.

More Information...

optimus outdoor noise measurement kit

High Noise Levels - To 170 dB

With the standard microphone fitted, the Optimus will measure up to 140 dB (143 dB Peak). While this is adequate for almost all applications, there are occasions when it is necessary to go higher. Measuring gunshot and even extreme car sound systems can need more than the usual 140 dB limit.

With the MK200EH High Level Noise Mic System the Optimus Green can measure up to 170 dB.

Order Codes

Sound Level Meter The Optimus Green sound level meters are part of the CR170 range

  CR171A - Type 1 Integrating Sound Level Meter with Logging, Audio and 1/1 Octaves $3948.00  
  CR171B - Type 1 Integrating Sound Level Meter with Logging, Audio and 1/1 & 1/3 Octaves $5122.00  
  CR172A - Type 2 Integrating Sound Level Meter with Logging, Audio and 1/1 Octaves $3181.00  
  CR172B - Type 2 Integrating Sound Level Meter with Logging, Audio and 1/1 & 1/3 Octaves $4256.00  
Calibrator The Calibrator is available as Class 1 or Class 2, usually to match the class of the meter:    
  CR515 Type 1 Sound Level Calibrator $514.00  
  CR514 Type 2 Sound Level Calibrator $365.00  
Accessories CK280 Carrying Case for Optimus Red Sound Level Meter, Calibrator and accessories  
  CU-USB AC Power Adapter for the Optimus Sound Level Meter $31.00  
  CU-CUSB Car Accessory Socket Adapter for Optimus Sound Level Meter $26.00  
Outdoor CK670 Outdoor Noise Measurement Kit  


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