SM-20A Amprobe Sound Level Meter

The SM-20A sound meter is for checking compliance with safety regulations and performing acoustic analysis by safety engineers, health, industrial and safety offices, as well as quality control. It also offers a PC interface.

It comes with a one-year limited manufacturer’s warranty.
Shop for SM-20A Sound Level Meter at MRM Metrology, and save more.
Use CAL SM-20A when ordering calibration services.

1 year warranty


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SKU: SM-20A Category:

Product Description

  • Features
  • Specifications
  • Dimensions
  • Accessories
  • Downloads
  • Calibration
○ Designed to meet the measurement requirements of Safety Engineers, Health, Industrial safety offices and quality control in various environment.
○ A and C weightings for checking compliance with safety regulations as well as acoustic analysis.
○ Measuring ranges: A Weighting 30~130 dB and C Weighting 35 to 135 dB.
○ Frequency range: 31.5 Hz to 8 KhZ.
○ Display with 0.1 dB steps on a 4 digit LCD.
○ Slow (1 seconds) and fast (125 ms) response settings to check peak and average noise levels.
○ MAX/MIN recording.
○ Data Hold to freeze reading on digital display.
○ Internal memory 14,0000 reocrds.
○ Recording intervals from 1 second to 8 hours.
○ PC computer download capabilities.
Measurement Range A Weighting:(30 to 130) dB C Weighting: (35 to 135) dB
Dynamic Range 50 dB
Resolution 0.1 dB, Display Update:0.5 second
Time Weighting FAST(125 mS), SLOW(1 second)
Frequency Range 31.5 Hz to 8 kHz
Accuracy ±1.5 dB
Calibration Cycle 1 year
Operation 41 to 104°F( 5 to 40°C); < 80% RH
Storage 14 to 140°F(-10 to 60°C); < 70% RH
Display 4-digit LCD
Microphone 1/2″ elctret condenser microphone
Power Life Appromximately 50 hrs (alkaline battery)
Environment Indoor Operation, < 2000m
Dimensions 7.8 x 2.2 x 1.5″ (200 x 55 x 38 mm)
Weight 0.5 lbs (233 g) including battery

○ A Certificate of Calibration is included when calibration services are ordered from MRM Metrology Inc.
○ Use CAL SM-20A when requesting calibration services.

Calibration and Repair Services

MRM provides Calibration and Repair Services for the
SM-20A Amprobe Sound Level Meter

For a quote, please email us at


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