"D" Scale Durometer
Models feature a heat-treated, high carbon steel mainspring that is calibrated to meet or exceed ASTM Specification D2240-81
Special cam permits a scale deflection of 100 points when the indenter is displaced exactly 0.100 inch
Threaded mounting knob at the top of each durometer permits permanent test stand emplacement
Resettable ancillary pointer will register the peak durometer reading against all vibrations met in normal use
"D" Scale durometer is designed for hard plastics - polystyrenes, vinyls, Formica, Plexiglas - hard rubbers and phenolic moulded materials