Personal Noise Dosimeter with USB Interface

Extech SL400

Model: SL400
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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. An optional 94 dB calibrator allows you to perform before-and-after calibration checks, per ANSI standards. The SL400 comes with PC software to control setup and retrieve stored events or analyze real-time measurements.

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General Specifications
30 to 140dB in 0.1dB steps
Exchange Rate
3, 4, 5 or 6 dB
Frequency Bandwidth
20Hz to 8kHz
Dose: 10,000 points/SLM: 999,999 points
Condenser 32" (81.3cm)
Response Time
Fast, Slow, Impulse
Sound Range (dB)
30 to 90 dB, 50 to 110dB; C, Z Peak: 70 to 140dB / C and Z Peak: 90 to 143dB
Sound Range (dB) Basic Accuracy
±1.4dB@94dB 1kHz
30 to 140dB in 0.1dB steps
A, C, Z
Additional Details
4.2 × 2.6 × 1.3" (107 × 65 × 33mm)
1 × 9V battery
2 years
7oz (198g)

Extech SL400 - Model: SL400

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