The Extech 407744 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" or 1.0" microphones, ensuring accurate and reliable calibration.

The Extech 407744 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 battery test position with a battery status LED indicator, providing a convenient way to check the battery status. This feature helps ensure that the calibrator is functioning properly and ready for use.

Constructed with a durable die-cast aluminum housing, the Extech 407744 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 94dB with high accuracy. It has a frequency accuracy of 5% and a sound level accuracy of ±0.5dB at the 94dB level. This level of accuracy ensures precise calibration and verification of sound level meter operation.

The Extech 407744 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.