• 407790A
  • Manufacturer has 4 in stock
    This stock is typically available to ship in 3 - 5 working days.



  • Range from 30 to 130dB
  • Accurate to ±1.5dB (ref 94dB @ 1kHz)
  • Can perform 1/1 and 1/3 octave band analysis simultaneously
    • 1/1 octave band analysis from 31.5Hz to 8kHz
    • 1/3 octave band analysis from 25Hz to 10kHZ
  • 160 x160 dot matrix backlit LCD displays Leq, LE, Lmax, Lmin, Lp, L05, L10, L50, L90, L95
  • Datalogging function stores over 12,000 readings
  • A, C and Z weighting with Fast or Slow response
  • Meets ANSI and IEC Type 2 standards
  • Internal self-test when powered ON
  • Detachable 0.52" (13.2mm) diameter condenser microphone and Tripod mount provided on rear
  • Analog AC/DC recorder output
  • Transferred data to a PC to be analyzed using software and cable provided

What's in the Box

  • Windows® compatible software
  • USB cable
  • 4 x C batteries
  • Microphone wind screen
  • Mini screwdriver
  • 120V AC adapter
  • Case


The Extech 407790A Octave Band Analyzer is a type 2 integrating sound level meter with Octave and 1/3 Octave Band real time display. The 407790A offers five measurement parameters: SPL (Sound Pressure Level), Leq (Equivalent Continuous Sound Pressure Level), SEL (Sound Exposure Level), Lmax (Maximum Sound Pressure Level), and Lmin (Minimum Sound Pressure Level).

The Extech 407790A Octave Band Analyzer has a range from 30 to 130dB with a standard accuracy of ±1.5dB (ref 94dB @ 1kHz). The 407790A features 1/1 and 1/3 Octave Band real‐time noise analyses. The built‐in memory stores 12,280 data records in sound level mode and 1024 records in Octave mode. The stored data can be easily transferred to a PC with the 407790A software and USB cable. This meter permits choice of ‘A', ‘C', or Flat 'Z' weighting and Slow / Fast /impulse response times. AC and DC analog output signals are available for chart recorders and other external recording devices.