Sound Examiner Sound Level Meters

Engineered to Accurately Measure Noise Levels in Highly Variable Environments. 

Sound Examiner™ SE-400 series of sound meters are engineered to accurately measure noise levels in highly variable environments. These easy-to-use detection instruments calculate the average sound pressure level (LEQ/LAVG) over the run time; data log the maximum, minimum and peak values, and enable data to be downloaded for further analysis.
Some models have Class/Type 1 or Class/Type 2 microphones; SE-401 and SE-402-R include removable preamps for environmental noise applications.
  • On-board data logging allows user to capture maximum, minimum and peak values for thorough analysis.
  • Meets IEC 61672-1 (2002) and ANSI S1.43-1997 (R2007) standards and is CE certified.
  • Optional SoundPatrol portable digital printing enables hard-copy documentation of measurement results in the field
  • User can specify microphone type (Class/Type I or Class/Type II) based on application.

For more information on the Sound Examiner Sound Level Meters, contact your local Air-Met office. 

  • Red models have Intrinsic Safety approvals
User Friendly
  • Intuitive interface allows for out-of-box use with little to no training
  • User selectable data logging intervals for download and analysis with 3M™ Detection Management Software
  • Averaging functionality allows for easy measurement in variable environments
  • Printing capability with optional digital printer* provides hard copy documentation in the field
  • Choose from models with Class/Type 1 or Class/Type 2 microphones, dependent on your application
  • SE-401 and SE-402-R models include removable preamp* for environmental noise applications
  • Meets applicable industry standards
  • Useful tool as part of a Hearing Conservation Program; be confident that data collected is accurate
*Available on non-Intrinsically Safe models only.
Parameters:  SPL, LMax, LMin, LPk (peak), LEQ/LAVG, LE, Elapsed Time
Peak and Frequency Weighting:  A, C, Z
Response Time:  Fast and Slow
Ranges:  110 dBA total dynamic measurement range. Overall range 30 – 140 dBA (single range)
Max Peak Level:  143 dBA (sampled peak)
Exchange Rates:  3, 4, 5 dBA
Status Indicators:  Run, Stop, Battery Status, OL (overload), UR (under-range), Run-Time, Locked Status
Size:  11.2" (L) x 2.8" (W) x 1.3" (D) /
28.4 cm (L) x 7.1 cm (W) x 3.3 cm (D)
(with preamp and microphone)
Weight:  SE-401 model: 12.9 oz / 367.5 g
(with preamp and microphone)
SE-402 model: 13.4 oz / 380.5 g
(with preamp and microphone)
SE-401-IS model: 14.5 oz / 410 g
(with preamp and microphone)
SE-402-IS model: 14.5 oz / 410 g
(with preamp and microphone)
Housing:  ABS Polycarbonate IP65. (Enclosure rated to IP65. Microphone and external connectors not IP rated.)
Tripod Mount:  Standard photographic mount on backside accepts ¼" – 20 screw threads
Drop Protection:  Minimum 2 meters onto concrete, 2 times on each face. Acceptable microphone damage.
Operating Temperature:  -10°C to 50°C (14°F to 122°F)
Humidity:  0 to 90% RH, non-condensing
Storage Temperature: -20°C to 60°C (-4°F to 140°F)
Atmospheric Pressure: Operating: 80 to 110 kPa;
Storage:  50 to 150 kPa
Power / Electrical Characteristics
Battery:  Lithium Polymer: 2500 mAHr for standard models / 1500 mAHr for IS models, rechargeable.
Run-Time: 18 hours minimum (excluding the backlight) for standard models / 8 hours for IS models
Battery Life:  3 years or 500 cycles (service replaceable)
Battery Charge:  USB charger is provided with instrument.
Battery charge time: 8 hours (approx.)
Internal Memory:  2MB (34 days at 1-minute logging)
Communications:  USB Interface
Standard Microphones: Class/Type 1 Precision QE4936 microphone
Class/Type 2 General QE7052 microphone
Preamplifier:  Preamp directly accepts ½" (13.2 mm) microphone
Remote Cable: Drives up to 15 m (50 ft) of cable with negligible signal loss (not available on IS)
Ports and Connections
AC/DC Output:  3.5 mm stereo (tip – AC, center ring – DC, ring – Gnd); not applicable to IS models
I/O Connector:  RS-232 (I/O connector not applicable to IS models)
USB:  Conforms to USB 2.0, mini-USB connector
Conformance to Standards
IEC 61672-1 (2002):  Electroacoustics, Sound Level Meters, Part 1: Specifications
American National Standards:

ANSI S1.43-1997 (R2007):

 Specifications for Integrating Averaging Sound Level Meters

ANSI S1.4-1983 (R2006): 

Specifications for Sound Level Meters
CE Mark:  Self Certified
Intrinsic Safety Standards
(SE-401 IS and SE-402 IS models):
UL 913, Ed.7, 2011-09-23
CSA C22.2 No. 157-92, (R2013)
EN 60079-0 (2009)
EN 60079-11 (2012)
EN 60079-26 (2007)
IEC 60079-0 Ed.5 (2007)
IEC 60079-11 Ed. 6: (2012)
IEC 60079-26 Ed. 2: (2009)
CE mark 0539
Certificate Number: IECEx UL 13.0006X, Class I, Division 1, Groups C and D
Exi is defined as Intrinsically Safe (for use in potentially explosive atmospheres)
Hazardous Locations Class:  Ex II 1 G Ex ia IIB T4 (DEMKO 13 ATEX 1210031X)
Ambient temperature range: -20ºC to +50ºC