Assessor Integrating Sound Level Meter Models 81CA & 82CA


Models 81CA & 82CA for Affordable Hearing Protection Prescription:

Expanding on the basic models in the Assessor range, the Models 81CA and 82CA effectively combine affordable noise measurement and compliances with International Industrial Noise Directives; these models use the established HML method of calculating required hearing PPE and are the ideal noise measurement instruments for people who do not want to pay extra for an instrument with 1:1 Octave band filters

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Noise Level Meter

Both the Model 81CA (Class 1) & 82CA (Class 2) Noise Level Meter is the ideal instruments for those who do not want an instrument with 1:1 Octave Band Filters when the HML method (High, Medium and Low), is an established and accepted method of calculating hearing protection requirements.

All hearing protection (PPE) should be supplied by the manufacturer with attenuation (reduction) values for each of the H, M and L values. By knowing the ‘C’ and ‘A’ weighted Leq values and the difference between them you can use either a spreadsheet or simple formula to select suitable hearing protection for your workforce.

C-A Measurement Mode

By just pressing the C-A button, the instruments will automatically switch to ‘C-A’ Measurement Mode. A Blue indicator shows that you are now measuring in C-A mode rather than the normal Broadband mode.

The noise level meter will make an Leq measurement with dB(C) weighting (LCeq) and will continue until the average level has settled. When the level has settled, the instrument will switch to dB(A) and repeat the process with ‘A’ weighting.

When this level has also settled, the instrument will display the LCeq, LAeq and in large digits the resultant LCeq – LAeq value on screen. Making this type of measurement has never been easier, as everything is done in an automatic cycle for you.


  • The Model 82CA (Class 2) and 81CA (Class 1) have all the features of the Assessor 81A and 82A but with the addition of an affordable and legally compliant way of specifying hearing protection.
  • Ideal for HML method of hearing protection calculation
  • Hearing protection measurements have never been easier; the C-A mode ensures automatic measurement calculation
  • Software upgrades available
  • Non-data logging option available


  • The Assessor range of sound level meters focuses on one main purpose and that is for compliance with International Industrial Noise Directives. This mindset has produced an extremely effective noise measurement tool for the busy Health & Safety Professional, Industrial Hygienist, Consultant, Manager, Supervisor, Technician or Engineer.
  • Noise at work
  • Industrial Hygeine
  • Quick Spot Checks


The ‘Analyser’ sound analysis software package is optional with the Models 81A & 82A instruments. The units are supplied as non datalogging with the option of upgrading at a later date.  Alternatively the two models can be supplied with the upgrade already fitted.

This exceptional sound analysis software Pulsar Analyzer package enables users to download quickly noise measurements to their computer and transform them into informative and professional reports.

The Pulsar Analyzer software also has a special database of hearing protectors that allows the user, at the click of a button, to have all calculations done for you automatically. A selection of hearing protection is listed and a report can be compiled.

This software is compatible with Windows 9x/Me/2000/NT/XP and Vista.

The Model 81CA & 82CA sound level meters come supplied with the following sound measurement equipment:

  • 12 month warranty
  • Operating manual
  • Certificate of calibration
  • Battery

The instrument can be supplied as part of a complete noise measurement kit, containing all that is required to carry out a noise survey.

Each Model 81CAK (Class 1) or 82CAK (Class 1) noise measurement kit contains:

  • Model 81CA or 82CA Sound Level Meter or noise meter
  • Model 105 (Class 1) or Model 106 (Class 2) Acoustic Calibrator
  • WS90 Windshield
  • K2 Hard Attache Case
  • Wrist Strap, Batteries (2 X AA)
  • Calibration Certificate for the sound level meter and its acoustic calibrator
  • ‘Analyser’ download, analysis and reporting software and USB download cable (with upgrade versions only)

Learn more about acoustic terms and their definitions here.

DHL Supply Chain
Following a claim we were defending, we were asked by our lawyers to supply noise measurement samples for a particular area in our factory. At this point, none of our managers were trained in noise assessment and it looked like we would have to pay out thousands of pounds to hire a consultant to give us all of the required information. After attending the Safety & Health Expo in Birmingham, we decided to purchase the Pulsar Assessor kit at just over one thousand pounds and arranged for Pulsar to present a Noise Awareness training day at our site in Warrington. We carried out our own assessment the next day after the training, downloaded all of the details onto the database supplied with the equipment, which gave us the measurements over an 8 hour period in minutes, graphs explaining the different levels at given times and this helped us identify if there were any issues in the problem area and even the type of PPE we would have to issue. The site then sent off all of this information to our lawyers who successfully defended the case saving the business in excess of seven thousand pounds.

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