https://indometer.co.id/casella-cel-633b2-k1-logging-enviromental-octave-band-digital-sound-level-meter-kit-class-2
CASELLA CEL-633B2/K1 LOGGING ENVIROMENTAL OCTAVE BAND DIGITAL SOUND LEVEL METER KIT CLASS 2
The CEL-63X can measure all parameters with all frequency and time weightings at the same time.