Danish BK4231 acoustic calibrator

Standard IEC 942 (1998) Class 1

Calibration pressure 94 and 114 dB SPL

Calibration frequency 1000 Hz

Calibration accuracy ± 0.2db

Sensor 1-inch and 1/2-inch

Features:

- in accordance with EN/IEC60942 (2003) and ANSI S1.40 -- 1984

- correction accuracy ± 0.2db

-94 dB SPL and 114 dB SPL2 correction levels

1 kHz correction frequency

1 "and 1/2" measuring microphone (1/4" and 1/8 "need adapter)