Model 407730

       Model 407730 is a kind of digital sound level meter which can measures and displays sound pressure levels in dB from 40 to 130dB. User selectable features include Frequency Weighting ('A' and 'C'), Response Time (Fast and Slow), Max Hold, and Max/Min recording. Careful use of this meter will provide years of reliable service.
       Model 407730 includes many parts seeing from the outside . the frist one is microphone. The second one is LCD display. The third one is ON-OFF button. The froth one is A/C weighting selection button. The fifth one is min/max record button. The sixth one is F/S response selection button. The seventh one is max hold selector button. The eighth one is calibration adjustment. The ninth one is AC analog output jack. The tenth one is windscreen.
       Then, there are some specificaitons about Model 407730. Display is LCD with bargraph. Microphone is 0.5" (10mm) electret condensor. Measurement Bandwidth is 300Hz to 8KHz. Measurement Range are 40 to 130dB (A wtg) and 45 to 130dB (C wtg). Frequency weighting is'A' and 'C' (selectable). Accuracy is ± 2dB @1kHz (under reference conditions). Resolution is 0.1dB.Response time are (Fast)125 milliseconds and (Slow)1 second. Calibration source is 1KHz sine wave @ 94 or 114dB. AC output is 0.707Vrms full scale. Power is 4 AAA Batteries. Battery life is 30 hours (typical)(low battery indicator alerts user). Automatic power off is after approx. 20 minutes. Operating temperature is 32^oF to 122^oF (0^oC to 50^oC). Operating humidity 10% RH to 90% RH. Storage temperature is -4oF to 140oF (-20oC to 60oC).
     Well, these are the general informations about 407730, if you are interested in it and want to know more abou it , please pay more attention to our web . Thanks for your atttention!