RR742 - An automated system for indicating spray clearance times of MVR spray booths and rooms

This report describes the design and assembly of an automated device to warn of the presence of paint spray mist inside a spray booth/room during spraying and during the clearance time. A timer switch, programmed with the clearance time, is triggered by a sensor that detects when the spray gun is turned on and off.

Two types of sensor are evaluated and recommendations made for different operational setups.

The system is relatively inexpensive and can be retrofitted to existing spray booths/rooms.

This report and the work it describes were funded by the Health and Safety Executive (HSE). Its contents, including any opinions and/or conclusions expressed, are those of the authors alone and do not necessarily reflect HSE policy.

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Updated 2021-04-23