Applications include : Pools, Spas, Aquariums, Labs, Aquaculture, Sanitation plants, Car washes, hydroponics, Water & Wastewater treatment and Boilers / Steam generator maintenanceUsed to check pH in water testing and treatment applications Dual LCD display with pH / mV and temperature (selectable C & F) USB port for data download to a PC (cable & software optional) Backlight display for use in dark areas pH electrode with Automatic Temperature Compensation for measurement accuracy 3 points pH calibration with automatic buffer recognition to prevent calibration errors Data Hold Max/Min and Data Recording Low bat indicator Auto power off