GY Fruit Sclerometer has four models: GY-1, GY-2 and GY-3, GY-4 which are to measure the hardness of apples, pears, strawberries and grapes, etc. It is a suitable instrument for fruit companies, fruit farm, fruit research institutions to test the ripeness of fruits. With compact size, low weight and ocular reading, it is suitable to use on the scene. It also can be applied with its matched test stands to improve the accuracy
When using your penetrometer you should check it daily before each use. You can loosen the springs by working the plunger a few times. You can calibrate the penetrometer by slowly pressing down on the pan of a weighing scale (not a spring scale) until the scale measures close to what you expect fruit firmness in subsequent tests to be. Make sure the reading of the penetrometer is the same as the scale reading.
Selecting the right fruit for testing is as important as making sure your penetrometer is calibrated. Such points to remember when selecting fruit are:
Avoid testing undersized or oversized fruit.
Trees you take the fruit from should be representative of the entire block’s age and vigor.
Use ten or more fruit from many different trees.
Take comparative readings from fruit that is the same temperature.
One you have your sample, measure firmness on each side of the fruit by using a peeler to remove the skin with a single shallow cut. Avoid taking measurements in bruised areas. Place the fruit on a hard surface – never take a measurement by holding the fruit. Push the plunger into the fruit up to the line on the probe, not the plate. Pushing the plunger at a consistent speed is important.
Because of the many variables involved in taking penetrometer readings by hand, it’s best to have one well-trained person do the testing for consistency
0.2 – 15 Kg/cm² (×10⁵Pa)
0.2 – 4 Kg/cm²(×10⁵Pa)
1-24 Kg/cm²(×10⁵ Pa)
0.5 – 12 Kg/cm²(×10⁵ Pa)
L140mm x W60m x H30mm
plums, citrus, melons,