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Personal Protection Equipment Industry News

New vibration PPE designedPosted on 11/08/2006

A new portable system designed to measure workers' exposure to the harmful influences of vibration from machinery, heavy vehicles and hand tools, has been designed by Bruel and Kjaer.

The Type 4447 Human Vibration Analyser is reportedly a battery-powered, compact yet standalone instrument ideally suited for applications in the field.

It features a versatile graphics display for instrument control and results analysis and is very simple to use.

Four buttons control all functions, displaying all necessary information to produce a virtually instantaneous assessment of exposure to vibration.

The Type 4447 Human Vibration Analyser bases its analysis of vibration on a number of parameters, including frequency-weighted hand-arm vibration and whole-body vibration, maximum transient vibration value, triaxial running RMS vibration and peak vibration, the combined vibration on all three axes as a vector sum, motion sickness dose value, vibration dose value and the crest factor for each axis.

Bruel and Kjaer said the new product has been developed following considerable consultation with parties in a number of fields, including occupational health departments, manufacturers of numerous forms of hand tools, and manufacturers of anti-vibration seats, knee-pads and personal protection equipment.


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