Extech 407730 Digital Sound Level Meter

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40-130dB Meter featuring large LCD display with analog bargraph

The 407730 sound level meter measures from 40 to 130dB with an accuracy of 2dB. The digital display offers a 0.1dB resolution and features a fast responding analogue bar graph. User can choose A or C weighting. Max Hold captures highest reading. Includes microphone wind screen and four AAA batteries.

CE logo    1 Year

PDF Logo    407730 Datasheet
PDF Logo    407730 User Manual


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SKU: Extech 407730 Categories: , Tags: ,

The Extech 407730 measures and displays sound pressure levels in dB from 40 to 130dB.

User selectable features include Frequency Weighting (‘A’ and ‘C’), Response Time (Fast and Slow), Max Hold, and Max/Min recording.

Extech 407730 Digital Sound Level Meter Features:

  • ±2dB accuracy with 0.1dB resolution
  • A+C weighting
  • AC analogue output
  • Record Max/Min values over time
  • Utilizes 0.5″(12.7mm) electret condenser microphone

Extech 407730 Specifications:                                                                                 

Display LCD with bargraph
Microphone 10mm (0.5”) Electret condensor
Measurement Bandwidth 300Hz to 8KHz
Measurement Range 40 to 130dB (A wtg), 45 to 130dB (C wtg)
Frequency weighting ‘A’ and ‘C’ (selectable)
Accuracy / Resolution ± 2dB @1kHz (under reference conditions) / 0.1dB
Response time Fast: 125 milliseconds / Slow: 1 second
Calibration source 1KHz sine wave @ 94 or 114dB
AC output 0.707Vrms full scale
Power 4 AAA Batteries
Battery life 30 hours (typical); low battery indicator alerts user
Automatic power off After approx. 20 minutes
Operating temperature 0 to 50°C
Operating humidity 10 to 90% RH
Storage temperature -20 to 60°C
Dimensions/weight 230 x 57 x 44mm / 172g


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