CENTER TECHNOLOGY | Series 321 Sound Level Meter (PC Interface)

CENTER 321 is our newly designed sound level meter. With all the functions 320 can provide, we had changed something in new designed back light LCD. We had added fast analog bar with peak hold two second in this tester. An auto range function is added for the tester to choose one proper range for measuring by the tester itself. RS232 interface is also added to provide real time data to the computer.


  • PC Interface
  • Bargraph Indicator
  • Auto Range: 30∼130dB
  • Auto Power Off
  • MAX/MIN function
  • Resolution 0.1dB
  • AC/DC signal output
  • IEC 651 TYPE 2


  • Level Range:Lo=30∼80dB ; Med=50∼100dB ; Hi=80∼130dB
  • Accuracy: 1.5dB (ref 95dB@1KHz)
  • Frequency Weighting: A & C
  • Time Weighting: Fast, Slow
  • Frequency Range: 31.5Hz to 8KHz
  • Dynamic Range: 50dB
  • Microphone: ½" Electret condenser microphone
  • Auxiliary Outputs: AC/DC Output
  • Battery: 9V x 1
  • Dimensions: 275 x 64 x 30mm
  • Weight: 280g

Standard Accessories:

  • Battery, operation manual, carrying case, calibration screwdriver, windscreen, 33.5Ø plug
  • (Optional: RS232 or USB cable, software)