Lutron Sound Level Meter 30-130dB (SL-4023SD) Datalogging. Class 2

Lutron Precision Digital Sound Level Meter (SL-4023SD) with Real Time Data Logger which can be stored on optional SD Memory Card.

• IEC1010-CLASS 2
• Real time SD memory card Datalogger with Built-in Clock and Calendar
• Programmable sampling time from 1 second to 3600 seconds (also supports manual logging and changing of data storage location)
• Big, easy to read, green backlit digital display (2.5" diagonal LCD)
• Makes measurements in auto ranging mode or within a manually programmable range
• Displays maximum and minimum readings and holds any reading
• Auto power off function (can be disabled)
• Data hold, maximum & minimum memory
• Condenser microphone for high accuracy & long-term stability
• 0.5" standard microphone head

Specifications :

• Display: 2.05" x 1.5" (52 x 38mm) LCD
• Frequency Range: 31.5Hz to 16kHz
• Measurement Range:
  • 30 to 130dB in auto ranging mode
  • User can also select fixed range of
    • 30 to 80dB
    • 50 to 100dB
    • 80 to 130dB
• Measurement Weighting:
  • By frequency: frequency weighing uses A or C standard
  • By time (using Class 1 IEC1010 standard): fast or slow (200ms or 500ms response time)
• Measurement Accuracy (with “A” frequency weighting): ± 2.0dB @ 31.5Hz, 1.5dB @ 63Hz, 1.5dB @ 125Hz, 1.4dB @ 250Hz, 1.4dB @ 500Hz, 1.1dB @ 1kHz, 1.6dB @ 2kHz, 1.6dB @ 4 kHz, +2.1 dB and -3.1dB @ 8kHz; +3.0dB and -6.0dB @ 12.5kHz, +3.5dB and -17.0dB @ 16kHz
• Data Logging Sampling Time Increments: 1 second to 1 hour
• Programmable 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
• SD card capacity: 1 GB to 16 GB
• 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" (245 x 68 x 45mm)
• Weight: 1.08 lb. (489g)
• Power Source: 6 AA batteries or optional 9vDC AC adapter