3M™ THE EDGE™4 Dosimeter

H2 Heading Personal Noise Dosimeter Offering Advanced Technology Packaged in a Cable-Free, Compact Frame.

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  • Overview
  • Features
  • Specifications
  • Applications
  • Support
The Edge EG4-D personal noise dosimeter offers advanced technology packaged in a cable-free, compact frame for a lighter, more ergonomic way to monitor noise levels. This innovative dosimeter weighs 3 ounces and features a contoured shoulder mount.
  • Kit includes eg4 model EdgeDock-1 single docking station and standard accessories
  • Rechargeable lithium polymer battery
  • Thin, contoured mount hugs the shoulder; compact frame offers superior comfort
  • Comfortable
    • Compact, 3-ounce (85 grams) unit mounts easily to the shoulder
    • Ergonomic design helps assure comfort
  • Intuitive
    • Large display with easy-to-use interface provides crucial information at a glance
    • The Edge eg5 offers three independent dosimeters that can
    • simultaneously measure against separate industry standards, all in one compact unit
  • Certified
    • Monitor can safely perform in potentially hazardous environments
Functional Requirements Include
Microphone: 1/4 inch prepolarized condenser (electret)
field replaceable threaded microphone
Measuring Range: 70dB - 140dB
Windscreen: Rugged foam permanently attached to a threaded  mount for maximum protection
eg4 has two independent dosimeters. eg5 has three independent dosimeters. Third dosimeter  is enabled through Detection Management Software.
Independent Thresholds: selectable from 70dB to 90dB or none
Independent Exchange Rates: 3dB, 4dB or 5dB for each dosimeter
Independent  Criterion Levels: from 70dB to 90dB in 1dB increments
Measurement Settings
RMS Range: 70dB to 140dB
RMS Weighting: A or C
RMS Time Response: Fast or Slow
Frequency Weighting: A, C, Z
Peak Detector
Peak Range: 110dB to 143dB
Peak Weighting: Selectable C or Z for eg4; Selectable A, C, or Z for the eg5 model (Peak is independent  of the RMS dosimeter settings)
Displayed Data / Values
LAVG or LEQ Current Date
Exposure  L C-A (eg5)
SPL  Max Level
Min Level SEL (LEP)
Dose  Threshold (TR)
TWA  Peak Level
Projected Dose (eg5) Upper Limit (UL) 
Run Time Identity Field (assigns a custom name to The Edge)
Displayed Status Indicators
Battery     Memory
Run/Pause  Overload Indication
Dose Exposure Indicator (Multicolored  LED, user selectable)
Docking Station: Single and Five Bay Versions
Communications: via the EdgeDock and USB to P
Typical recharge: 2 to 4 hours
Complete instrument its neatly into EdgeDock without removing mounting devices
Power / Electrical Characteristics
Battery: Lithium Polymer (Flat cell)
Battery Life: eg4 model 60+ hours,
eg5 intrinsically safe 40 hours nominal
without  LED activated
Battery Charge: Quick charge  in EdgeDock in 2 to 4 hours. Recommended  daily download data with simultaneous  battery charging for maximum efficiency
Memory Capacity: 180 hours
Communications: Short haul serial Infrared (SIR) via the
ANSI S1.25 Personal Noise Dosimeters
IEC61252 Personal Sound Exposure Meters
Intrinsic Safety: (eg5) EN 60079-0:2006, EN 60079-11:2007, EN 60079-26:2007
IECEx certification number: SIM 08.0012
ATEX Directive 94/9/EC  for use in Potentially Explosive Atmosphere xcertification number: Sira 09ATEX2269
CSA International  (US and Canada)
certificate number: 2283414
MSHA Approval number:  18-A100008-0
Physical Characteristics
Weight: 3 ounces (85 grams)
Size: 3.5" long x 2.1" wide x .75" thick
(88mm x 53mm  x 19mm), eg5 is .82" (21mm) thick
Case Material: Engineered Polymer
IP Rated: 65
Keypad: 4 keys – Up Arrow, Down Arrow, Run/Stop, On/Off, Enter
Display: 128x64 LCD
RoHS Compliant
Lockable Windscreen
Alligator Clothing Clip / Suspender Clasp
Environmental Characteristics
Operating Temperature Range: -10 °C to 50 °C (14 °F to 122 °F)
Storage Temperature Range: -25 °C to 60 °C (-13 °F to 140 °F)
Humidity Range: 0 to 95% Non-Condensing
Additional Features
Device Setup: Easy, quick setup  via DMS software in Chinese, Czech, English, French, German, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish, and Turkish
Data Logging: LAVG or LEQ, Max, Peak and Overload
Indication at one minute intervals
Calibration times displayed
Lock out security function (multilevel)