A field evaluation of Frisbee-type dust deposit gauges

The inefficiency of the standard gauges currently used for measuring ambient dust deposition has led to the development of new designs based on the shape of an inverted Frisbee. Field comparisons between various different versions of the Frisbee gauge and the current British Standard dust deposit gauge were carried out at two rural sites continuously over a period of 17 months. The wet Frisbee (coated with liquid paraffin) and a dry Frisbee (with a polyester foam insert) out-performed the BS gauge and two other versions of the dry Frisbee. The dry Frisbee with foam is recommended because of various problems associated with the sticky coating of the wet Frisbee. The dry Frisbee with no insert of any kind was inferior to the BS gauge and its use should be discontinued.