With Automatic Timer
The apparatus consist of a cast aluminium base with an iron stand on which moves an aluminium arm. A 6" dial is fixed on this arm and a brass chromium plated rod slide through the lower portion of the arm. A needle with weights is fitted to this rod. The dial is graduated from 0-400 in one tenth millimeter sub division. Supplied complete with adjustable needle holder, penetration needle sample container, transfer dish and weight of 50 gms.
Same as above but with automatic digital timer and electrical arrangement.