New BSWA308/BSWA309 Octave Sound Level Meter


New BSWA 308/BSWA 309 is new generation octave sound level meter upgrade from base BSWA 308/309. The new types update the dual-core (DSP+ARM) architecture to single chip ARM with FPU, and update all fix-point calculation to float-point which significantly improves the accuracy and stability. Re-design analog front end circuit also lower the noise floor and linear range of product. BSWA 308 is Class 1 and BSWA 309 is Class 2. Both instruments have certificated by the China CPA (Certification of Pattern Approval) and CMC (China Metrology Certification).


  • Class 1 (New BSWA 308) and Class 2 (New BSWA 309) sound level meter
  • Comply with IEC 61672-1:2013, ANSI S1.4-1983 and ANSI S1.43-1997
  • 1/1 Octave in accordance with IEC61260-1:2014 and ANSI S1.11-2004
  • Linearity range: 20dBA~134dBA (BSWA 308), 25dBA~136dBA (BSWA 309)
  • Single range to cover 123dB/122dB dynamic range
  • Frequency weighting: A/B/C/Z. Time weighting: Fast/Slow/Impulse
  • 3 profile calculation in parallel with different frequency/time weighting. 14 custom define measurement
  • Calculate SPL, LEQ, Max, Min, Peak, SD, SEL, E
  • LN statistics and time history curve display
  • User define integral period measurement, integral period up to 24h
  • High speed ARM core with FPU (Float Point Unit) to achieve wide frequency response, large dynamic range and low noise floor
  • 4G MicroSD card (TF card) mass storage
  • RS-232 remote control port
  • Mini thermal printer for measurement data print
  • Internal GPS module (option), support GPS timing


  • Basic noise measurement
  • Environmental noise assessment
  • Product quality check
  • Evaluation of noise reduction engineering