The sampling bias of the mini sampler versus the IOM sampler and the open-face 25-mm filter holder, respectively, depends on the size distribution of the sampled aerosol. Four headset models were tested for their suitability as a sampler holder, of which three models were accepted by the welders. Several aspects related to using the mini sampler have been tested by personal and static sampling at five workplaces and in the laboratory.
#Sampling train breathing zone professional#
The mini sampler is to be worn mounted on a headset, modified from professional microphone headsets. The nominal flow rate of the mini sampler is 0.75 l min −1. The mini sampler is based on a commercially available 13-mm filter holder that has been modified to incorporate an inlet nozzle made of aluminium. This mini sampler is easy to use and can be mounted inside modern, slimline welder's face shield. A headset-mounted mini sampler has been developed to fill this gap with focus on manganese exposure. Existing aerosol samplers are too large to be mounted inside modern welder's protective equipment without disturbing the worker. There is a need for a small personal aerosol sampler for measuring occupational exposure to airborne particles in the breathing zone.
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