Extech 407730 Digital Sound Level Meter
The Extech 407730 is a handheld digital sound level meter that measures sound pressure levels from approximately 40 dB to 130 dB with selectable A- and C-weightings and built-in Max/Min and Max-Hold functions.
Description
The Extech 407730 is a general-purpose, handheld sound level meter designed to measure and display sound pressure levels in dB. It supports selectable frequency weightings (A or C) and response times (Fast or Slow), and includes features such as Max Hold and Max/Min recording.
It covers a measuring range from 40 dB up to 130 dB (for A-weighting) and slightly adjusted for C-weighting (45 dB to 130 dB) under its normal operating bandwidth.
The unit includes a large digital LCD with a bar-graph for visual feedback, and supports auto-ranging (with manual override) and a tripod mount for more stable measurements.
Features
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Measurement range: 40 to 130 dB (A-weighting), and 45 to 130 dB (C-weighting).
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Accuracy: ±2 dB (typical under reference conditions, at 1 kHz) with resolution of 0.1 dB.
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Selectable frequency weighting: A & C.
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Selectable response time: FAST (~125 ms) or SLOW (~1 s) for various sound sources.
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Max Hold function: Captures highest reading seen while enabled.
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Max/Min recording mode: Records and displays maximum and minimum values since mode activation.
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Auto ranging by default (AUTO), with manual range override across four manual ranges: 40-70, 60-90, 80-110, 100-130 dB.
Includes
- Microphone wind screen
- Four AAA batteries
