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Sound Level Meter, 70 dB, 140 dB, 1.4 dB, 5 °C, 40 °C


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SL400   Datasheet
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Technical Documents (1)

Product Overview

SL400 is a personal noise dosimeter with a USB interface. Sound level monitoring is essential to determine what protective measures are required for employees who are routinely exposed to loud noise. Perform noise surveys in compliance with OSHA, MSHA, DOD, ACGIH, and ISO standards with the Extech SL400 dosimeter. An SL400 noise accumulation survey can determine total sound exposure over an 8-hour period. This compact, lightweight dosimeter can also serve as a sound level meter, logging up to 999,999 readings with sampling times between 1 second and 24 hours. The SL400 comes with PC software to control setup and retrieve stored events or analyze real-time measurements. Typical applications are personal accumulated noise exposure measurement, workplace noise assessment, OSHA and other regulatory agencies compliances.
  • Measures frequency weighted noise exposure and peak (C, Z) sound level
  • Adjustable criterion level, exchange rate, and threshold
  • One user-defined measurement setup
  • Criterion is 30 to 140dB in 0.1dB steps, 3, 4, 5 or 6dB exchange rate
  • 20Hz to 8KHz frequency bandwidth, memory is dose: 10,000points/SLM: 999,999points
  • Dimension is 107 × 65 × 33mm
  • 2 years warranty
  • Condenser 32" (81.3cm) microphone
  • 30 to 140dB in 0.1dB steps threshold
  • Fast, slow, impulse response rate


SL400 personal noise dosimeter with a USB interface, Belt clip, Clip-on 0.5" (12.7mm) microphone with 32" (81.3cm) cable and windscreen, 9V battery, Software, USB cable, Carrying case.

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