Extech SL400 Personal Noise Dosimeter with USB Interface


Key Features:

  • Measures frequency weighted noise exposure and peak (C, Z) sound level
  • Datalogs up to 999,999 readings when used as a sound level meter with sampling times between 1 second and 24 hours
  • Sound level mode: displays sound level, min/max, time-averaged sound level (Leq), peak, and sound exposure level (SEL)
  • Adjustable Criterion Level, Exchange Rate and Threshold
  • One user-defined measurement setup
  • Optional 94dB calibrator to perform "before" and "after" calibration checks per ANSI standards
  • USB interface with Windows®-compatible software to control setup and retrieve stored events or analyze real-time measurements
  • Complete with belt clip, clip-on 0.5" (12.7mm) microphone with 32" (81.3cm) cable and windscreen, 9V battery, software, USB cable, and carrying case
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The SL400 Personal Boise Dosimeter with USB Interface from Extech is the ideal solution for sound level monitoring. The SL400 is suited to carry out OSHA and IEC Noise accumulation surveys, ascertaining total sound exposure over an 8 hour period. Noise surveys for compliance with OSHA, MSHA, DOD, ACGIH and ISO standard can also be execute with the SL400. The compact, lightweight design provides users with flexibility and the included PC software enables setup control and the recovery of stored events or the analysis of real-time measurements.
Standards IEC61252-1993, IEC67672-1-2003, ANSI S1.25-1992, ANSI S1.4-1983, ANSI S1.43-1997
Ranges (Accuracy) 30 to 90 dB, 50 to 110dB; C, Z Peak: 70 to 140dB / C and Z Peak: 90 to 143dB (Accuracy: ±1.4dB@94dB 1kHz)
Frequency Weighting A, C, Z
Response Rate Fast, Slow, Impulse
Bandwidth 20Hz to 8kHz
Memory Dose: 10,000 points/SLM: 999,999 points
Criterion Level / Threshold Level 30 to 140dB in 0.1dB steps / 30 to 140dB in 0.1dB steps
Exchange Rate 3, 4, 5 or 6 dB
Measurement Duration 5, 10, 15, or 30 minutes; 1, 2, 4, 8, 10, 12, or 24 hours
Measurement Modes %Dose, Lxmax, Lxyp, Lxmin, Lxeq, SEL (LAE), PeakMAX, LAVG, TWA, LEP, LN%
SPL, Lxmax, Lxyp, Lxmin, Lxeq, SEL (LAE) PeakMAX
Dimensions/Weight 4.2 x 2.6 x 1.3” (107 x 65 x 33mm) - exclude connector on top/ 7oz. (198g) include batteries and microphone cable
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  • Personal accumulated noise exposure measurement
  • Workplace noise assessment
  • OSHA and other regulatory agency compliances