... -3 three models, used to judge fruits’ maturity by testing hardness of fruit such as apple, pear, watermelon, banana and so ... Sclerometer: GY-1 / GY-2 / GY-3Specification: Fruit Sclerometer (Fruit hardness Tester), this series includes GY-1 GY-2 and GY ... -3 three models, used to judge fruits’ maturity by testing hardness of fruit such as apple, pear, watermelon, banana and so ...