407790A Extech Analyzer

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  • Wide measurement in 5 ranges: 20 to 90dB, 20 to 100dB, 20 to 110dB, and 30 to 120dB, 40 to 130dB
  • 3.5" (320x240) TFT color LCD with backlight feature displays Leq, LE, Lmax, Lmin, Lp, L05, L10, L50, L90, L95
  • Stores readings on microSD card
  • Precise linearity over wide range (100dB)
  • Transferred data to a PC to be analyzed using software and cable provided
  • A, C and Z weighting with Fast or Slow response
  • 25Hz to 10kHz frequency 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
  • Real time clock with Year, Month, Day, Hour, Minute and Second display
  • Optional microphone extension cable for measurements in enclosures and other remote locations (407764-EXT)
  • Complete with Windows® compatible software, USB cable, 4 x C batteries, microphone wind screen, mini screwdriver, 120V AC adaptor, and case


  • 407764-EXT - 15ft (4.7m) Microphone Extension Cable
  • 407766 - 94/114dB Sound Calibrator
  • 407744 - 94dB Sound Calibrator


  • Applicable standards: ANSI S1.4 Type 2, EN IEC 60651, EN IEC 60804, and EN IEC 1260-1995
  • Accuracy: ±1.5dB (ref 94dB @ 1kHz)
  • Measurement functions: Lp, Leq, LE, Lmax, Lmin, L05, L10, L50, L90, L95,
  • Frequency range: 25Hz ~ 10kHz
  • Frequency Weighting: A, C, and Z
  • Time Weighting: Fast, Slow, 10ms (τ), I
  • Display: 3.5" (89mm) 320x240 TFT color backlit LCD; Displays 1/1, 1/3, and 1/1 & 1/3
  • 1/1- 1/3 Analyzer level range: 5 ranges in 10db steps: 20 to 90dB, 20 to 100dB, 20 to 110dB, 30 to 120dB, 40 to 130dB
  • 1/1 Octave and 1/3 Octave 1/1: Octave band center frequencies: (9 bands);
  • 1/3 Octave band center frequencies: (27 bands)
  • Signal output: AC output: 1 Vrms (at full scale); DC output: 3.0V, 25mV/dB
  • Memory: microSD card (included)
  • Measurement Time: 1s to 23h 59m 59s
  • Power: Four type C size 1.5V batteries, External DC power: 6V, 1A

Extech’s Type 2 Integrating Sound Level Meter with Octave and 1/3 Octave Band Real Time is displayed on a large 3.5" 320x240 TFT color backlit LCD.

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