The apparatus, used for determining the ?y ash ?neness by wet sieving, comprises a special stainless steel sieve, 0.045 mm opening, a spray nozzle 17.5 mm dia. with 17 holes 0.5 mm dia oriented ans spaced conforming to the speci?cations, a pressure gauge 80 mm dia. and fittings for connection to the water supply.

• Weight approx.: 2 kg