Auckland-based Compac Sorting Equipment has developed a device that uses infra-red to test fruit quality.
Its TasteMark grader "snaps" an internal picture of fruit passing underneath a cup conveyor belt.
"The unit is connected to special software in an associated computer unit, which reads and interprets the infra-red light. It tells you what the fruit is like internally, no matter what it looks like on the outside," says project manager Karen Lawton.
The results can be used to determine what prices the fruit should be sold at and enables fruit to be traced back to the growers.
The unit, housed in a 45cm high cylinder 20cm across, has been tested extensively.
Lawton says the device can be used for all summer fruit, and trials with Australian packers helped growers achieve premium prices as the sorter could test taste.
The grader was developed with backing from Technology New Zealand.
It goes on show this week at the Produce Marketing Association exhibition in California.