"The CEL-35X dBadge series includes the CEL-350 standard and the CEL-352 Plus models. Each is available with or without intrinsic safety approvals. Both provide overall run data of dose and projected 8 hour dose values as well as the actual elapsed time average and the calculated 8 hour time weighted average (TWA) levels. An employee can comfortably wear either unit all day, simply by attaching it to a shirt, overalls or hardhat. The instrument is operated with only two buttons located on its side. Once in operation, the unit captures a time history for every noise event in a single measurement range of 65 to 140 dB, including average noise level and peak value, which is logged in one-minute values for later analysis.The CEL-350 standard model has logging of time history samples at 1 minute intervals during a run. Average and maximum noise levels with the 5 and 3 dB exchange rates as well as instantaneous peaks are saved to provide a complete time history that can be viewed in Casella CEL Insight™ software. This provides a powerful analysis capability by indicating exactly when the most dangerous noise levels occurred at any specific time of day.CEL-352 Plus dosimeters provide all the advantages of the CEL-350 and also give C-weighted average noise level data along with the A-weighted result to aid in the correct selection of hearing protectors following international recommendations. The instrument automatically calculates the 'C minus A' (C-A) time averaged result on-board the dosimeter and the value is displayed in the included software.