â·ÃÊͺ¶ÒÁÃÒ¤Ò à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤Ã×èͧÇÑ´ÃдѺ¤ÇÒÁ´Ñ§àÊÕ§ Sound Meter > Professional Sound Level Meter à¤Ã×èͧÇÑ´àÊÕ§ 407732 Dual-range Type 2 digital sound level meter with backlit LCD Professional Sound Level Meter à¤Ã×èͧÇÑ´àÊÕ§ 407732 / Standard CE , IEC651 Type 2 , ANSI S1.4 Type 2 / 407732: Low/High Range Sound Level Meter Dual-range Type 2 digital sound level meter with backlit LCD Features: High accuracy meets ANSI and IEC 651 Type 2 standards High and Low measuring ranges: 35 to 100dB (low) and 65 to 130dB (high) Data Hold and Max Hold functions Backlit LCD display to view in dimly lit area 1.5dB Accuracy Level range:30~130dB Features Provides 1.5dB accuracy Meets IEC651 type 2 standards Newly Design Shape High Performance Max Hold and Data Hold Function Specifications Level Range Low=30~100dB High=60~130dB Accuracy ±1.5dB(ref 94dB @ 1KHz) Frequency Range 31.5Hz to 8KHz Frequency Weighting A,C Time Weighting Fast,Slow Auxiliay Outputs AC/DC Signal Output Battery Type 9V Battery NEDA 1604,IEC 6F22,JIS 006P Operation Temp 0℃~40℃(<80%R.H.) Storage Temp -10℃~60℃(<70%R.H.) Size(HxWxD):210mm x 55mm x 32mm Weight:230g Accessories:9V battery,Carrying case and Manual. 407732 Extech Sound Meter à¤Ã×èͧÇÑ´ÃдѺàÊÕ§ à¤Ã×èͧÇÑ´àÊÕ§