The 3M™ Noise Indicator alerts users to potentially dangerous noise levels, helping identify areas where hearing protection may need to be worn. Users simply clip the unit to a shirt or jacket - the LED light delivers a clear indication when noise levels exceed a potentially hazardous threshold. A red flashing LED indicates that noise levels are above 85dB and that hearing protection may be required. A green flashing LED indicates that noise levels are below 85dB and that hearing protection may not be necessary. The Noise Indicator's small size (2"H X 1.4"W X 0.5"D) and lightweight design make it ideal for workers in a variety of industries. The rechargeable battery operates for up to 200 hours between charges.
The intuitive design of this detector makes it easy for users to measure sound levels and determine the degree of hearing protection required. Unit computes the average sound pressure level, allowing for more accurate assessment of intermittent sound levels. This model measures sound levels from 45-130dB. The user-selectable LED alert screen provides a quick visual reference of sound levels with green, yellow and red LEDs that flash when preset noise levels have been reached. Unit measures 6.5"H X 2.4"W X 0.9"D and comes with a rechargeable lithium polymer battery, microphone windscreen and a USB cable to charge the instrument with a computer. Order a Calibrator (#31529) to calibrate and verify sound level meter operation.