Operation is relatively simple. To measure, place the leaf under the clear plastic on the scan board. Push and hold the button on the side of the scanner as you slowly move the scanner over the leaf. Stored data can be sent to a computer or printer with the supplied cable. The cable is connected to the serial port of the receiving unit.
Threshold is adjustable with a roller switch on the side of the scanner.
Weight 4.5 lbs. Since the scanner has 7 pixels per mm horizontally, and only 1 pixel per mm vertically, long samples should be placed vertically on the board for the most accurate measurement. The NiCad pack of 13 AA sized batteries will take about 400 scans before needing a recharge. The NiCads can be replaced with alkaline AA's, but you should never attempt to recharge alkaline batteries.