The tapped density of powdered, granular of flakey material is highly dependent on the manner in which the particles are packed together. During tapping, particles gradually pack more efficiently, the powder volume decreases and the tapped density increases.
Under controlled conditions of tapping rate, tap force (ie drop) and cylinder diameter, this condition of maximum packing efficiency is highly reproducible. Tapped density measurement (sometimes referred to as tapped bulk density, or just tap density) is formalized in a number of international standards to which both Autotap models conform.
The Autotaps are normally supplied with 250ml cylinders, but you may request 10ml, 25ml, 50ml, 100ml or 500ml instead. A larger optional platform is required to accommodate the largest cylinder we offer, the 1000ml. But, of course, this platform does accommodate all the smaller cylinders too. If you need to ensure the same fixed number of taps for all analyses, an optional special lockout feature is also available which prevents unauthorized changes to the counter.