... GY-3 2.fruit hardness tester 3.test apple, pear, watermelon, banana hardness 4.Fruit test GY-1 Fruit Sclerometer,Durometer ... ’ maturity by testing hardness of fruit such as apple, pear, watermelon, banana and so on. It’s portable, small on volume ... ’ maturity by testing hardness of fruit such as apple, pear, watermelon, banana and so on. It’s portable, small on volume ...