General Tools DSM402SD Datalogging Class 2 Sound Level Meter

Accurately Measures Sound Levels of Machinery or an Environment with 0.1 dB Resolution. Features patented technique for storing sampled data in Excel format on removable SD memory cards.

• Measures sound levels of machinery or an environment
• 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
• Includes: Hard carrying case, Sound wind shield ball, 2 GB SD memory card, and User’s manual

• Noise pollution control
• OSHA noise regulatory compliance
• Acoustics design

• Display: 2.05 x 1.5 in. (52 x 38 mm) LCD
• Frequency Range: 31.5 Hz to 8 kHz
• Measurement Range:
  -30 to 130 dB in auto ranging mode
  -User can also select fixed range of 30 to80 dB, 50 to 100 dB, or 80 to 130 dB
• Measurement Weighting:
  -By frequency: 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: ± 3.5 dB@ 31.5 Hz, 2. 5 dB @ 63 Hz, 2 dB @ 125 Hz,1.9 dB @ 250 Hz, 1.9 dB @ 500 Hz, 1.4 dB@ 1 kHz, 2.6 dB @ 2 kHz, 3.6 dB @ 4 kHz,5.6 dB @ 8 kHz
• 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
• Operating Temperature: 32° to 122°F (0° to 50°C)Operating Relative Humidity: 0 to 85%
• Dimensions: 9.65 x 2.68 x 1.77 in. (245 x 68 x 45mm)
• Weight: 1.08 lb. (489g)
• Power Source: 6 “AA” batteries or optional 9-VDC AC adapter

• General Tools DSM402SD Datasheet.pdf