ISO 9001 Can judge fruit's mature degree there are GY-1, GY-2 and GY-3 three kinds of models I.Functions and CharacteristicThe ... fruit sclerometer (also called fruit hardness tester), this series has GY-1, GY-2, GY-3three kind of models, use to testing apple, pear ... .4. Pressure head fruits should be vertical surface.5. GY-1 and GY-2 type fruit hardness tester scale units for the outer ...