... , GY-2 and GY-3 three kind of models. Brief descriptionFruit Sclerometer (Fruit hardness Tester), this series includes GY-1 ... three models, used to judge fruits’ maturity by testing hardness of fruit such as apple, pear, watermelon, banana and so on ... values. It is can be used to fruit tree scientific research department, fruit company, fruit tree farm. colleges and universities,ect. Scale value ...