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Amprobe SM-20-A Sound Meter

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Amprobe SM-10 Sound Meter
Amprobe SM-10 Sound Meter

The Amprobe SM-20-A Sound Level Meter has been designed for audible sound level measurements. The A weighting is for general noise sound level and the C weighting is for measuring sound level of acoustic materialcontrol in various environments (ie 94dB 1 kHz etc.). The SM-20-A conforms to the IEC651 Type 2, ANSI S1.4 Type 2, and JISC1502 requirements for Sound Level Meters. Which means the SM-20-A uses two different weighting filters required by the IEC 651 and ANSI S1.4 Type 2: The A-Weighting and the C Weighting audio filtering.


  • Designed to meet the measurement requirements of Safety Engineers, Health, Industrial safety offices and quality control in various environments.
  • A and C weightings for checking compliance with safety regulations as well as acoustic analysis
  • Measuring ranges: A Weighting 30~130dB, C Weighting 35~130dB
  • Frequency range: 31.5Hz~8KHz
  • Display with 0.1dB steps on a 4 digit LCD
  • Slow (1 sec) and fast (125ms) response settings to check peak and average noise levels
  • MAX/MIN recording
  • Internal memory, 14,000 records
  • Recording intervals from 1 second to 8 hours
  • PC computer download capabilities
  • Data Hold to freeze reading on digital display
  • CE, designed to meet IEC651 Type2, ANSI S1.4 Type2
Display:    4 digits LCD
Microphone:    1/2 inch Electret condenser microphone
Power Supply:    9V NEDA 1604, IEC 6F22, JIS 006P battery
Auto Power Off:    Approx. 5 min
Environment:    Indoor operation, < 2000 m
Standard Applied:    IEC 651 Type2, ANSI 1.4 Type 2
Dynamic Range:    50 dB
Resolution:    0.1 dB, Display Update: 0.5 sec.
Time Weighting:    FAST(125mS), SLOW(1 sec)
Accessories:    Carrying case, windscreen, User manual and 9V battery
Model NameDescription
SM-20-A
  • Designed to meet the measurement requirements of Safety Engineers, Health, Industrial safety offices and quality control in various environments.
  • A and C weightings for checking compliance with safety regulations as well as acoustic analysis
  • Internal memory, 14,000 records
Included Accessories:   Carrying case, users manual, battery(installed),USB cable download and software CD
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