Employing resonance as trigger mode, Feather Probe™ supports tips as small as 100 microns in diameter and trigger forces below 1 mg for measurement of extremely small features as well as fragile or easily deformed features. Dynamic Resonance Mode eliminates effects of such external influences as temperature, air motion, and vibration. Typically protected behind cover when not in use, styli can be automatically deployed into measurement area whenever needed and retracted when not in use.