... judge fruit's mature degree there are GY-1, GY-2 and GY-3 three kinds of models I.Functions ... (also called fruit hardness tester), this series has GY-1, GY-2, GY-3three kind of models, use to testing apple ... head fruits should be vertical surface.5. GY-1 and GY-2 type fruit hardness tester scale units for ... 105 Pa, the inner ring scale is kg/cm2, GY-3 type, connecting the small pressure head, with inner ...