The Centurion NDT Model FM-140XL conductivity meter makes conductivity testing simple and worryfree...for most non-ferrous metal testing. Portable, yet ruggedly designed, it instantly generatesreadings with a bright, direct digital display, in percent IACS (International Annealed CopperStandard). To prolong battery life, readings only display when probe and testing surfaces meet.The FM-140XL delivers precision accuracy to +/- .5% of the readings at 20° C. Included is a RS-232port which allows the user to download information to computers, micro-controllers or otherperipherals. The FM-140XL is housed in a compact, lightweight and shock resistant case for long lifeand durability. Placing the probe against the testing surface generates a direct conductivity reading inlarge brilliant LED digits. The front panel features a sorting gate, go/no-go, red or green LED display