Professional, field-proven conductivity meter with backlit LCD graphic display for mobile measurement, data logger, USB interface, set with TetraCon® 325Messgerät in carrying case with 4-pole conductivity measuring cell TetraCon® 325, LF standard solution 1413 iS / cm at 25 ° C , stand, beaker, short instruction manual, CD-ROM, batteries, driver software for USB, USB cable