Extech 407766 94/114dB Sound Calibrator

Key Features:

Dual-level calibration output (94 dB & 114 dB): Provides selectable reference levels to calibrate and verify sound level meters — useful for both everyday checks and high-level acoustic instruments.

1 kHz sine wave signal for accurate calibration: Outputs a stable 1 kHz tone to ensure your SLM’s microphone is reading correctly.  

High accuracy and low distortion: Signal accuracy of ± 0.5 dB at 94 dB and ± 1.0 dB at 114 dB. Distortion (THD) is kept under 2% at 94 dB.  

Compatibility with standard microphones: Designed for use with sound level meters that have 0.5-inch or 1.0-inch microphones — common in professional acoustic instruments.  

Meets international calibration standards: Compliant with IEC 60942 (1997-11) standard for sound calibrators — ensuring reliability and industry-recognized calibration quality.  

Rugged, portable housing: Durable die-cast aluminum body provides reliability and longevity; compact and lightweight for field or lab use.  

Easy operation — quick calibration check: Simple 3-position switch (OFF / 94 dB / 114 dB) and LED power indicator make calibration fast, clear and user-friendly.  

Complete kit included: Comes with two 9 V batteries, screwdriver, and carrying case — ready to use out of the box for calibration tasks.