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Model 91 Advanced Integrating Sound Level Meter

Sound Level Meter
Type 1 data logging integrating sound level meter

Type 1 Data Logging, Integrating Sound Level Meter

  • Type 1 to IEC 60651, IEC 60804 and ANSI S1.4
  • IEC 61672-1:2003 Class 1
  • Simultaneous Leq, SPL, Lmax,  Peak and Ln's (L10, L50, L90, etc).
  • "A", "C" and "Z" (flat from 10 Hz to 20 kHz ± 1.5 dB) frequency weightings on channel 1.
  • "C" weighting on channel 2 for simultaneous Peak measurements.
  • RMS "Fast", "Slow" and "Impulse" time weightings.
  • Clear graphical display with backlight.
  • Rugged cast aluminum case.
  • Seven Measurement ranges, covering:
    • 21 to 140 dB(A), Peak 143 dB(C).
  • Noise floor 18 dB(A).
  • Powered by two AA cell batteries - over 30 hours operation.
  • Dimensions:
    • 13.3" x 2.9" x 0.9", 15.8 ounces
    • 340mm x 75mm x 25mm, 450g
  • Measurements stored for display or transfer to computer using the software provided.
  • Available in a weatherproof Outdoor Measurement Kit

This precision grade sound level meter is particularly suitable for environmental noise measurement. With its Type 1 performance, removable microphone stem (can take a microphone extension cable), data storage and automatic timing functions it meets most environmental applications. It is also perfectly suited for the professional acoustician involved in noise at work applications.

Environmental and Community Noise Surveys

The Model 91 meter is ideal for general environmental and community noise surveys and assessments. The ability to measure down to 21 dB(A) makes it suitable for locations with low ambient noise levels. For this type of survey it is often necessary to make repeating, timed measurements (e.g. measure every 15 minutes). The Model 91 can be set to make such measurements, automatically restarting and storing parameters such as LAeq, L90, Lmax, and many others. It also stores the Leq every second, giving a graph of the noise level over time for further reporting and analysis.

Occupational Noise at Work Surveys

The Model 91 is a Class 1 Integrating Sound Level Meter and so is more than adequate for most occupational noise measurements. For OSHA type measurements please see our OSHA Sound Level Meter.

Analyzer Software

The Analyzer software and download cable are provided at no extra cost with the Model 91. Click here for more information.

Additional Documentation

pdf datasheets
Class 1 Logging Sound Level Meter
2 weeks
Noise Measurement Kit with P91, Calibrator, Software, Windshield and Case
2 weeks
More pricing information

How to Buy

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Prices and Ordering

Order Code
Price (USD)
Class 1 Logging Sound Level Meter
2 weeks
P91 Sound Level Meter, Calibrator and Software
2 weeks
Noise Measurement Kit with P91, Calibrator, Software, Windshield and Case
2 weeks
Class 1 Acoustic Calibrator. 1kHz, 94dB. For 1/2 inch microphones
90mm Windshield for 1/2 inch Microphone Capsules
In stock
Hard Carrying Case
Lightweight Tripod
Tripod Mount for Preamplifier
2m Extension Cable for MV200 Preamplifier
5m Extension Cable for MV200 Preamplifier
10m Extension Cable for MV200 Preamplifier

Delivery Charges

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