Extech SL355 Personal Noise Dosimeter/Datalogger

Extech SL355 Personal Noise Dosimeter/Datalogger


The Extech Personal Noise Dosimeter measures frequency weighted noise exposure and peak sound level simultaneously.


  • Datalogs up to 12,000 readings
  • Stores up to 20 dosimeter surveys
  • USB interface
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The Extech Personal Noise Dosimeter performs OSHA and IEC Noise accumulation surveys. The dosimeter measues frequency weighted noise exposure and peak soundlevel simultaneously over an 8-hour period. It datalogs up to 12,000 readings when used as a sound level meter with sampling times between 1 second and 1 hour. In sound level mode, the meter displays sound level, time-averaged sound level peak, and sound level exposure.


Up to 20 dosimeter surveys are stored with start/stop time, %dose, %dose projected for an 8 hour period, and peak level when used in the dosimeter mode. The USB interface allows for connection to a PC using the software for setup and retrieval of stored events, or to analyze real-time measurements. Applications include personal accumulated noise exposure measurements, workplace noise assessment, and OSHA and other regulatory agency compliances.

Notable Specifications:
  • Standards: IEC61252 ,ANSI S1.25(1992) for dose and sound exposure meters
    IEC 60651-1979 Type 2 for sound level meters
    ANSI S1.4-1983 Type S (1) for sound level meters
  • Ranges: 60 - 130 dB / 70 to 140dB (A/C weighting)
    60 to 130dB / 93 to 133dB (C or Z (linear) peak)
    70 to 140dB / 103 to 143dB (C or Z (linear) peak)
  • Digital display: LCD 0.01-9999%
  • Criterion level: 80, 84, 85, or 90dB
  • Exchange rate: 3, 4, 5 or 6 dB
  • Threshold level: 70 to 90 (1dB steps)
  • High level detector/peak flag: 115dB, 130dB and 140dB
  • Response rate: fast or slow
  • Measurement duration: 5, 10, 15, or 30 minutes
    1, 2, 4, 8, 12, or 24 hours
  • Microphone: 1/2 inch electret condenser with 31” cable
  • Battery life: >35 hrs
  • Event storage: 20 surveys
  • USB interface: yes
  • Real time clock/calendar: yes
  • Dimensions/weight: 3.8 x 2 x 1.4” (97 x 51 x 35mm) 4.2oz. (120g) incl.batteries
What's Included:
  • (1) Dosimeter
  • (1) Belt clip
  • (1) Clip-on 0.5" microphone with 2.6ft (0.8m) cable
  • (3) AA batteries
  • (1) Mini screwdriver
  • (1) Software
  • (1) USB cable
  • (1) Carrying case
Image Part # Product Description Price Stock Order
Extech SL355 Personal Noise Dosimeter/Datalogger SL355 Personal noise dosimeter/datalogger
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Extech SL355 Personal Noise Dosimeter/Datalogger SL355-NIST Personal noise dosimeter/datalogger, includes NIST certificate
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Image Part # Product Description Price Stock Order
Extech Sound Calibrators 407766 94/114dB sound calibrator for 0.5" or 1" microphones
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