Optimus Green Sound Level Meter for Environmental Noise Surveys and BS4142 Assessments

By: Noisemeters  05/12/2011
Keywords: audio recording, Environmental Noise, Data Logging

The Optimus Green sound level meter is available as either Class 1 or Class 2 - the most common for environmental noise measurement and more accurate being Class 1. This meter also has everything needed for occupational noise measurement in line with the Noise at Work regulations, making it ideal for anybody involved in both environmental (outside the factory) and occupational (inside the factory) noise.

There are many features included with this meter that are designed to make the task easier. Functions such as a single measurement range, voice notes and audio recording are included in all Optimus Green meters.

The Green range also includes real-time octave band filters and data logging with software and download cable. They measure A, C and Z frequency weightings simultaneously along with Fast, Slow and Impulse time weightings.


Our Recommendation

Most environmental noise surveys demand the use of a Class 1 Sound Level Meter that can make repeating measurements, such as the 5 minute LAeq and L90 (background noise).

We recommend the Class 1 Optimus Green with Data Logging (order code CR171A ). If there is any noise with a high tonal content, then the 1/3 Octave Band option is recommended (order code CR171B).

All environmental noise regulations demand the use of a Sound Level Calibrator. We recommend the Class 1 Calibrator, order code CR515.

Versatile Display for Use in Bright or Dark Conditions    

  Standards IEC 61672 Class 1 or Class 2
IEC 60651, IEC 60804 & ANSI S1.4 Type 1 or Type 2
Octave & 1/3 Octave Filters to IEC 61260 & ANSI S1.11
  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 12 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) Class 1, <21dB(A) Class 2
  Freq. Weightings A, C & Z measured simultaneously
  Time Weightings Fast, Slow & Impulse measured simultaneously
  Integrators Three simultaneous "virtual" noise meters
  Ln Statistical Values 14 Ln values. Preset: L1, L5, L10, L50, L90, L95 & L99
plus seven user defined Ln values
  Audio Recording Manual or threshold triggered
Standard quality: 16-bit, 16 kHz sampling
High quality: 32-bit, 96 kHz sampling
Optimus Green Order Codes x
CR172A Class 2 Int. Sound Level Meter with Logging & Octaves €2734,00
CR172B Class 2 Int. Sound Level Meter with Logging & 1/3 Octaves €3658,00
CR171A Class 1 Int. Sound Level Meter with Logging & Octaves €3394,00
CR171B Class 1 Int. Sound Level Meter with Logging & 1/3 Octaves €4318,00

CR514 Class 2 Acoustic Calibrator €323,00
CR515 Class 1 Acoustic Calibrator €455,00
CK280 Optimus Carry Case €104,00
CK670 Weatherproof Outdoor Kit €2231,00

CU-USB Mains Power Supply €29,00
CU-CUSB Car Accessory Socket Power Adapter €24,00
The information in this article was current at 02 Dec 2011

Keywords: audio recording, Band Filters, Data Logging, Environmental Noise, Noise at Work, noise measurement, Noise Surveys, RESOLUTION GRAPHIC, sound level meter,

Other products and services from Noisemeters


Sound Level Meter and Noise Dosemeter Service and Calibration

Faults and Repairs - Under this standard calibration service, most adjustments or repairs that have to be made to bring the meter back into tolerance will be carried out without extra charge. For sound level meters and noise dosemeters, these tests include the frequency responses, time responses and linearity of the meter. The equipment will undergo detailed testing to ensure that it meets the relevant standards.


Noise at Work Sound Level Meter

For more advanced use, or where the noise levels are particularly high, we recommend Optimus Red Class 2 with with logging and octaves with Calibrator. For basic occupational noise measurements, we recommend the standard Optimus Red Class 2 (order code CR162A) with Calibrator. Class 2 Integrating Sound Level Meter with Data Logging.


doseBadge Noise Dosemeter for Noise at Work Assessments

The dosemeter is the best option when workers are moving between locations, between different pieces of machinery, or are working in an area that makes it difficult or dangerous to follow them round with a sound level meter. In these cases, rather than making lots of spot measurements with a sound level meter and then calculating the worker's noise exposure, a dosemeter monitors for the full working shift and provides you with these parameters.


Noise Dosemeter and Sound Level Meter Combination Kits

A dosemeter is also a better option when the worker is in location that makes the use of a hand-held meter difficult, such as confined spaces or the cab on moving machinery. Use a dosemeter (or personal sound exposure meter, PSEM) when the worker is moving around continuously, or between many different locations. A dosemeter can take much less time to use as you do not have to follow the worker around while making measurements.


Noise Nuisance Recorder for Measuring Neighbour Noise

The audio record, which is closely associated with the noise measurements, is there so that you can be sure that any unacceptable noise levels were due to neighbours, dogs, music, machinery or any of the other common causes of complaint.


Sound Level Meter for Noise Surveys and General Purpose Measurements

If the data logging option is fitted then all the measurement parameters are stored, along with time, date and other relevant information. Making measurements usually consists of checking the calibration, recording a voice tag if required*, and then taking the readings. Maybe you don't know at this stage whether you might need an Integrating sound level meter.