เครื่องวัดความดังเสียง, Digital Sound Meter, Decibel Meter, Noise tester AZ8928

Description:  The digital sound level meter is easy to use and handy instrument for sound quality control in office, home, school and construction site. The meter has wide range of applications such as noise pollution studies, research and other industrial use. Features: Conformed to the IEC 651 Type 2 and ANSI S1.4 Type 2 set standard  Wide Measuring Range: 40 ~ 130 dB  With 2 equivalent weighted sound pressure levels A and C  Fast and Slow dynamic characteristic modes  Bar graph indication for Sound Level Range  Maximum hold function  Large LCD screen with 4 digits reading  MAX/MIN QUASI-ANALOG BAR INDICATOR  AUTO/MANUAL RANGING SELECTION  Fast & Slow response selectable  Auto power off : 20 min after non-operation  Low battery indicator  Monitor the sound levels from traffic noise, alarm systems and workplace machinery  Specification:  measurement frequency range: 300Hz ~ 8K Hz  quasi-analog bar indicator 1dB display steps, 30dB dosplay range updated every 50ms  measurement level ranges 4 ranges: 40~70dB, 60~90dB, 80~110dB, 100~130dB  meas. level A weighting 40dB~130dB  meas. level C weighting 45dB~130dB  accurary ±2dB(at 94dB, 1K Hz)  microphone 10mm(Dia) Electric Condenser Microphone  Digital Disolay 3.5" LCD 0.1 resolution updated every 0.5 sec  Power: 1x9V battery (not inclued) Package included:  1 x Decibel Meter a user manual