CALL: A.WIHARTA 081294124885 085778084789 087784022201 Karya Mandiri Instrument indonesia adalah supplier peralatan laboratorium baik eletronik maupun mekanik, serta berbagai macam instrument measurement, dengan didukung dari berbagai macam merk dari negara negara Eropa, US, dan beberapa negara di Asia seperti Korea, Japan dan Taiwan. Instrument yang kami sediakan seperti : Anemometer, Analitical Balance, Spectrophotometer, pHmeter, Laser survey, Micropipette, Peristaltic Pump, Flame photometer, Water bath heating cooling, Colorimeter, Water Strirer, Viscometer. Freezers, Refractometer, Polarimeter, Sound Level meter, Tachometer. Dll Kami juga menerima jasa service dan kalibrasi untuk peralatan laboratorium sesuai kemampuan kami.   The Extech 407760 USB sound level datalogger has a 30 to 130 dB range with datalogging capability up to 129, 920 records. There is a selectable data sampling rate and readings are recorded with a real time clock. The Extech 407760 USB sound level datalogger has two start methods: programmed ( from PC) or manual. The datalogger also has 0.5 " electret microphone. The Extech 407760 USB sound level datalogger ships complete with a 3.6V lithium battery, Windows ® compatible software, USB cover, tripod USB extension cable and windscreen. Specification Range 30 to 130dB Frequency Range 31.5 to 8kHz Basic accurancy ± 1.4dB Weighting A and C Response Time Fast ( 125ms) / slow( 1s) Datalogging 129.920 points PC Interface USB Dimensions 5.1× 1.1× 0.9 " ( 130× 30× 25mm) Weight 1oz( 20g)