SOUND LEVEL METER The Extech 407355 personal noise dosimeter is a low cost, lighweight and easy-to-use instrument for measuring total sound exposure over an 8-hour period. The Extech 407355 personal noise dosimeter is perfect for performing OSHA and IEC noise accumulation surveys. The Extech 407355 personal noise has an adjustable criterion level, exchange rate, and threshold. Up to 5 dosimeter surveys can be stored in the Extech 407355 personal noise dosimeter, and the data includes start/ stop time, % dose, TWA, and peak flags when in dosimeter mode. Features:  • Perform OSHA and IEC Noise accumulation surveys • Adjustable Criterion Level, Exchange Rate, and Threshold • Applications include Personal accumulated noise exposure measurement, Workplace noise assessment, OSHA and other regulatory agency compliances • Datalogs up to 4500dB readings when used as a sound level meter • Optional 94/ 114dB calibrator to perform “ before” and “ after” calibration checks per ANSI standards • Stores up to 5 dosimeter surveys. Data includes Start/ Stop Time, % Dose, TWA, peak flags, when used in the Dosimeter mode • Bi-directional RS-232 with Windows® 95/ 98/ NT/ 2000/ ME/ XP compatible software to control setup and retrieve stored events or analyze real time measurements. Complete with 9 pin to 25 pin adaptor, and RS-232 cable. • Includes belt clip and clip-on 0.5” microphone with 2.6ft ( 0.8m) cable, 4 AAA batteries, mini screwdriver and carrying case, software, and cables Specifications:  Standards: meets ANSI S1.25(1991) Type 2, ISO-1999, BS 402 (1983) Range: 70 to 140 dBA Resolution: 0.1dB Digital display: LCD 0.01-9999% Criterion level: 80, 84, 85, or 90dB Threshold level: 70-90 (1db steps) Response rate: Fast or slow Exchange rate: 3, 4, 5, or 6 dB Frequency weighting: A High-level detector: 115dB Peak flag: 140dB Dimensions: 4.2"x2.5"x1.3 (106x64x34mm) Weight: 8oz. (227g) including batteries Microphone: 0.5" electret condenser with 31 cable Battery life: 34 hours Event storage: 5 surveys RS-232 interface: Yes Real-time clock: Yes CE: Yes Warranty: 1 year