Graigar ND9B Sound Level Noise Calibrator Meter Mics 94dB/114dB Accuracy Mics EMF Meters the rotation speed of the

the rotation speed of the generator set deceases

all parameters can be adjusted from the controller front panel controller

Details: HSM300 Synchronous Module is special design for genset automatic parallel

Light source device: LED blue light excitation

no need special driver

Graigar ND9B Sound Level Noise Calibrator Meter Mics 94dB/114dB Accuracy Mics EMF Meters the rotation speed of theBrand: Graigar Color: Black Features: ND9B Sound Level Calibrator employs solid state integrated circuitry that provides accurate and stable performance. Suitable for field and laboratory use. Sensitivity calibration of 1" and 1 2" microphones. Meet the standards GB T15173, ANSI S1. 40 CLASS2, IEC942. Handy sound source for quick and easy calibration of sound level meters and sound measuring systems. model number: ND9B Part Number: ND9B Details: