... 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.Strawberry, grape’s fruit ... , the pressure head insert into the fruit indicators, when the pressure head to ... instructions Objectives of reading instruction is the fruit of hardness, for three average.Measured:Rotary ...