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Martindale SP79 Class 2 Sound Level Meter

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Suitable for offices, industrial environments and other on-site applications, use Martindale's SP79 for simple measurements of sound in accordance with the Noise at Work regulations.

A type 2 sound meter, the Martindale SP79 features A and C frequency weighting (A replicates the noise a human ear can hear, C is used for measurements of peak sound pressure levels) and fast/slow time weighting. It can be used for single, quick measurements of sound or you can mount the SP79 on a tripod (sold separately) and activate the MIN/MAX mode to calculate the maximum/minimum values taken over a period of time.

The SP79 can measure sound levels from 32 to 130dB and has frequency range from 20Hz to 8kHz. A 1/2 inch electret condenser microphone is built into the top of the instrument and a removeable windshield is included as standard.

Martindale SP79 Class 2 Sound Level Meter Key Features

  • Sound meter for basic measurements of sound in offices/industrial conditions etc
  • Class 2 sound meter
  • Selectable A and C frequency weighting
  • Fast/slow time weighting options
  • Measurement range from 32 to 130dB
  • Digital readout with analogue bargraph display
  • Detachable windshield
  • Made in accordance with BS EN 61672-1: 2003
  • Optional sound calibrator available - part number SPC70

What's Included?

  • Martindale SP79 Sound Meter
  • 1 x 9V Battery
  • Windscreen
  • Storage Case
  • Instructions

Martindale SP79 Technical Specifications

Measuring Range 32 to 130dB
Frequency Range 20Hz to 8kHz
Frequency Weighting A or C
Level Ranges Lo: 30 to 90dB
Med: 50 to 110dB
Hi: 70 to 130dB
Accuracy ±1.4dB (at reference conditions)
Dynamic Range 60dB
Time Weighting Fast or Slow
Microphone 1/2 inch elecret condenser microphone
AC Output 1V rms at full scale (full scale is the upper limit of the selected level range)
DC Output 10mV/dV
Display Liquid crystal (LCD)
Digital, 4 digits, updates 2/second
Bargraph, 30 segments, updates 10/sec
Power 1 x 9V, PP3 alkaline battery (IEC 6LR61, NEDA 1604A)
Continuous Operating Time 60 hours typical (alkaline battery)
Automatic Power Off After approx 30 minutes
Low Battery Indication Battery symbol is displayed
Dimensions 258 (L) x 55 (W) x 25mm (D)
Weight Approx 185g including battery
Environmental/Other Specs
Operating Conditions Temperature: 0 to 40°C
Relative Humidity: 10 to 90% RH
Storage Conditions Temperature: -10 to 60°C
Relative Humidity: 10 to 75% RH
Compliance BS EN 61672-1 Class 2
EMC BS EN 61326-1
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Additional Information
Manufacturer Part Code MARSP79
Model Ref SP79 Sound Meter

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