The Extech 407766-NIST Professional Sound Calibrator is a high-quality instrument designed for calibrating and verifying the operation of sound level meters. This calibrator is specifically designed for use with 0.5 in. or 1 in. microphones, ensuring accurate and reliable calibration.

The Extech 407766 is an essential tool for professionals in various industries, including acoustics, environmental monitoring, and audio engineering. It allows for precise calibration of sound level meters, ensuring accurate and compliant measurements.

The calibrator features a level position switch that allows you to select between two sound levels: 94dB or 114dB. This selection can be made using the switch, and a power on LED indicator light confirms the selected level. This feature provides versatility for different calibration needs.

Constructed with a durable die-cast aluminum housing, the Extech 407766 is built to withstand rigorous use in various environments. Its robust design ensures long-lasting performance and reliability.

The calibrator generates a 1kHz sine wave at either 94dB or 114dB, depending on the selected level. It provides high accuracy with a frequency accuracy of 5% and a sound level accuracy of ±0.5dB at 94dB or ±1.0dB at 114dB. This level of accuracy ensures precise calibration and verification of sound level meter operation.

The Extech 407766 meets the IEC standard 60942 1997-11, which is an internationally recognized standard for sound calibrators. This compliance ensures that the calibrator meets the required specifications and provides reliable and accurate calibration results. It includes NIST Certification.