A powerful portable ISE meter for ionic analysis of water samples. Compatible with a full range of ion-selective electrodes, the rugged, waterproof handheld unit includes a large protected backlit LCD display and touch-sensitive keypad. The intelligent unit automatically recognises ion selective electrodes, eliminating the need to specify the ion type, and offers direct ion concentration readout, simplifying the measurement process. 2-5 point calibrations are possible, with the facility to specify the eight common concentration calibration points across the linear range.