Fruit Firmness Tester, Series:6003 (also known as a Fruit Pressure Tester) is a penetrometer that measures fruit firmness and provides a quick, easy and, according to university studies, accurate method to determine fruit maturity. Firmness, or degree of softness or crispness, is used worldwide as a test of ripeness and maturity of many fruits. The Fruit Tester can be used as either a hand-held instrument or can be mounted on a test stand for more precise measurements. Rugged Construction: High impact plastic case, aluminum dial, precision steel spring, brass mechanism chassis, impact resistant plastic crystal, stainless steel plunger and accessories. Parts disassemble for easy cleaning. This tool is perfectly fit to detect proper picking maturity and control fruit softening during cold storage. It measures the pressure necessary to force a plunger of specified size into the pulp of fruit.