à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´àÊÕ§ > à¤Ã×èͧÇÑ´ÃдѺàÊÕ§ à¤Ã×èͧÇÑ´àÊÕ§ Sound Meter ST-8850 / DT-8850 Sound Level Meter The function can be used to measure noise in factories, schools, offices, airports and home, etc, checking acoustics of studios, auditoriums and Hi-Lo installations. Features - Provides 1.5dB accuracy - Meets IEC651 type 2 standards - Newly Design Shape - High Performance - Max Hold and Data Hold Function - Analog AC/DC outputs for connection to an analyzer or recorder - Built-in calibration check Specifications Range: Low(Low)-Weighting: 35dB~100dB; Hi(High)-Weighting: 65dB~130dB Frequency Weighting: A, C: Lo(Low)-Weighting: 35dB~100dB; Hi(High)-Weighting: 65dB~130dB Resolution: 0.1dB Accuracy: 1.5dB at 94dB sound level, 1kHz sine wave Measurement rate: 1.5 times per second, norminal Storage temperature: -10~60 Deg.C (<80%R.H.) Over-range: “OL” mark indication Size(HxWxD): 251mm x 63.8mm x 40mm Weight: 250g à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤Ã×èͧÁ×ÍÇÑ´ à¤Ã×èͧÇÑ´àÊÕ§ > à¤Ã×èͧÇÑ´ÃдѺàÊÕ§ à¤Ã×èͧÇÑ´àÊÕ§ Sound Meter ST-8850 / DT-8850 Sound Level Meter