4 August 1995

Fresh air helmets a real dust buster

DUST, water-based aerosol, chemical splash and debris impact protection is offered by a battery-powered respirator.

The Purelite Air Shield, from Helmet Integrated Systems, incorporates a particulate filter that removes contaminants from the surrounding atmosphere, providing a constant supply of clean air over the face. The system is said to be particularly suitable for allergy sufferers as well as for general use.

A rechargeable battery gives up to four hours continuous operation, with an eight-hour option available. Price starts from about £170 (01776-704421).