Extech 407780 Integrating Sound Level Datalogger


Extech 407780 Integrating Sound Level Datalogger


  • 4-digit multifunction LCD with analog bargraph
  • Precise linearity over wide range (100dB)
  • Display modes: SPL, SPL MIN/MAX, SEL, and Leq
  • Programmable integrating time
  • A and C Frequency weighting
  • Impulse/Fast/Slow response settings
  • Datalogging function records up to 32,000 records
  • Real time calendar/clock
  • Analog and alarm output features can be used to connect with Frequency analyzers, chart recorders, external dataloggers, and sound level alarms
  • Built-in USB interface with included Windows® datalogging software
  • Tripod mount
  • Meets IEC 61672-1, 60651/60804 Type 2 and ANSI S1.4 Type 2 specifi cations
  • Complete with windscreen, adjustment screwdriver, USB cable, Windows® compatible software, battery, and case


Applicable Standards IEC 61672-1, 60651 and 60804 Type 2, ANSI S1.4 Type 2
Accuracy ±1.5dB (ref 94dB@1KHz)
Resolution 0.1dB
Digital Display 4 digital LCD
Measurement Parameters SPL, SPL MIN/MAX, SEL, and Leq
Measurement Range 30dB to 130dB
Linearity Range 100dB
Measurement Frequency Range 31.5Hz to 8KHz
Frequency Weighting A and C
Response Impulse, Fast and Slow
Microphone 1/2 " Electret condenser microphone
Sampling time updated every 0.5s
Bargraph 4dB steps, 100dB range, 125ms update
Display Warning Function
Overrange Indicator Displayed at the upper limit
Underrange Indicator Displayed at the lower limit
Analog AC/DC Output 2Vrms (at full scale), 10mVDC/dB
Power Supply Four 1.5V AA batteries, Optional AC adapter
Battery Life Approximately 24 hours
Dimensions 10.4x2.8x0.8" (265x72x21mm)
Weight 10.9oz (310g)


Extech 407780A 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 Level 30 dB
Maximum Sound Level 130 dB
Display (Sound Level Meter) Digital
A Frequency Weighting Yes
B Frequency Weighting No
C Frequency Weighting Yes
Frequency Range Max 8 kHz (8000 Hz)
Resolution (Sound Level Meters) 0.1 dB
Accuracy ±1.5
Calibrator Capability No
Vibration Measurement No
Noise Level Measurement Yes
Fast/Slow Time Adjustment Yes
Min/Max Display Yes
Tripod Mount Yes
Type (Sound Level Meter) II
    Product Images (click to enlarge)
    • Extech 407780 Integrating Sound Level Datalogger