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General DSM403SD Class 1 Sound Level Meter With Excel-Formatted Data Logging SD Card

General Tools DSM403SD
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General Tools, DSM403SD Data Logging Sound Meter with SD Card, Class 1


  • Big (2.5 in. diagonal) front-panel green backlit LCD is easy to read
  • Makes measurements in auto ranging mode or within a manually settable range
  • Displays maximum and minimum readings and holds any reading
  • Performs automatic data logging at sampling time settable from 1 second to 9 hours
  • Also supports manual logging and changing of card storage location
  • Auto power off function


  • Noise pollution control
  • OSHA noise regulatory compliance
  • Acoustics design
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List Price: $499.99
Sale: $349.99
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Product Information

General DSM403SD Class 1 Sound Level Meter With Excel-Formatted Data Logging SD Card

Sound Meter with SD Card accurately measures sound levels of machinery or an environment with 0.1 dB resolution. This sound meter with SD card's unique feature is its patented technique for storing sampled data in Excel format on removable SD memory cards.

What's In The Box

  • Hard carrying case
  • Sound wind shield ball
  • 2 GB SD memory card
  • User’s manual


Embedded Microcontroller Custom single-chip LSI device
Display Type LCD with green backlight
Display Size 2.05 x 1.5 in. (52 x 38mm)
Parameter Measured dB
Frequency Range 31.5 Hz to 16 kHz
Measurement Range 30 to 130 dB in autoranging mode
User can also select fixed range of 30 to 80 dB, 50 to 100 dB, or 80 to 130 dB
Measurement Weighting By frequency: using Class I IEC 61672 standard; frequency weighing uses “A” or “C” standard
By time: time weighting is fast or slow (200 ms or 500 ms response time)
Measurement Accuracy With “A” frequency weighting: ± 2.0 dB @ 31.5 Hz, 1.5 dB@ 63 Hz, 1.5 dB @ 125 Hz,1.4 dB @ 250 Hz, 1.4 dB @500 Hz, 1.1 dB @ 1 kHz, 1.6dB @ 2 kHz, 1.6 dB @ 4 kHz,+2.1 dB and -3.1dB @ 8kHz; +3.0 dB and -6.0 dB @12.5 kHz, +3.5 dB and -17.0 dB @ 16 kHz
Measurement Resolution 0.1 dB
Data Logging Sampling Time 1 second to 1 hour
Settable Parameters Date, time, auto power off, beep sound, sampling time, decimal point or comma decimal division, “A” or “C” frequency weighting, fast or slow time weighting
Storable/Recallable Readings Maximum, minimum
SD Card Capacity 1 GB to 16 GB
Operating Temperature 32° to 122°F (0°to 50°C)
Operating Relative Humidity 0 to 85%
Power Supply Six Alkaline “AA” batteries or optional 9-VDC AC adapter
Power Consumption 8 mADC (normal operation, with backlight off and SD card not saving data)
14 mADC with backlight on and card saving data
44 mADC with backlight on and card saving data

General Tools DSM403SD Product Specifications Summary:
(for full specs please see the full specs tab or the data sheet)

Environmental Testers / Physical Property/Sound Level Meters Template

Minimum Sound Level30 dB
Maximum Sound Level130 dB
Display (Sound Level Meter)Digital
Single RangeNo
Dual RangeYes
A Frequency WeightingYes
B Frequency WeightingNo
C Frequency WeightingYes
Frequency Range Max8 Ghz (8000000000 Hz)
Resolution (Sound Level Meters)0.1 dB
Calibrator CapabilityYes
Vibration MeasurementNo
Noise Level MeasurementYes
Fast/Slow Time AdjustmentYes
Min/Max DisplayYes
Tripod MountNo
Type (Sound Level Meter)II

Test Equipment General Attributes

Warranty1 YEARS
Power Supply VoltageBattery Powered
Safety ApprovalRoHS
Data Logging What's This?Yes
Interfaces I/O RS-232
StorageSD Card
Product Weight1.08 LBS
Battery Type9v, AA


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