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The Pocket Fruit Penetrometer PPF-300 is a portable device designed to determine the maturity (ripeness) of fruit.
Most commonly used to determine if fruit is ready for harvest, or also at markets when determining the quality of fruit. The firmness of the fruit translates to how ripe fruit is. See table for more information.
The PPF-300 is made of rugged construction with a high impact plastic case, aluminium dial, steel spring, brass mechanism chassis and stainless steel plunger. The peak hold feature allows the key data to be held until reset by pressing the push button to return the device to zero.
FEATURES
| Fruit | Tip Size | Harvest | Shop Ready |
| Apple | 11mm | 16 | 10-14 |
| Avocado | 8mm | 32-30 | 18-22 |
| Kiwifruit | 8mm | 10 | 7 |
| Honeydew | 8mm | 14-18 | 5-10 |
| Nectarine | 8mm | 12 | 10-14 |
| Pears, Anjou | 8mm | 15 | 10-14 |
| Pears, Asian | 8mm | 13 | 7-10 |
| Pears, Bartlett | 8mm | 19-22 | 15-18 |
| Pears, Bosc | 8mm | 16 | 11-13 |
| Peach | 8mm | 12-14 | 12 |
| Plum | 8mm | 6 | 4-5 |