Extech 407790A Real-Time 1/1 and 1/3 Octave Band Sound Level Analyzer (Type 2)

Manufacturer: Extech Instruments (FLIR Systems)

Model: 407790A (Real-Time 1/1 and 1/3 Octave Band Sound Analyzer)

Standards & Compliance: Meets IEC 61672-1 Class 2, IEC 61260 Class 1 (Octave Bands), and ANSI S1.4 Type 2

Measurement Modes: Real-time 1/1 octave band (16 Hz to 16 kHz across 11 bands) and 1/3 octave band (12.5 Hz to 20 kHz across 33 bands)

Sound Level Range: 25 dB to 130 dB (A-weighting)

Measured Parameters: SPL, Leq, LE (SEL), Lmax, Lmin, Peak, and statistical percentiles (Ln)

Frequency Weighting: A, C, and Z (Linear/Flat)

Time Weighting: Fast, Slow, 10ms, and Impulse

Display: 3.5″ high-resolution backlit TFT color LCD displaying numerical readings and real-time frequency bar graph spectrums

Data Storage: MicroSD / SD memory card slot for continuous real-time data logging in CSV format (PC compatible via USB without specialized software)

Outputs: AC/DC analog signal outputs for external recorders and FFT analyzers

Power Source: 4 x C-cell batteries (approx. 24 hours continuous operation) or 9V DC external AC adapter

Package Includes: Precision 1/2″ condenser microphone with preamplifier, windscreen, SD memory card, USB cable, calibration certificate, and rugged hard-shell carrying case