On-Line Ph Controller 1.LCD display 2.100 ~ 240 VAC 50/ ... industry. The built-in dot matrix LCD can display pH values, mV value, temperature, alarm settings ... 14.00pH, -1999mV~+1999mV,-30°C~130°C.Display typeLCD.Display informationpH / ORP (mV), pH mV, temperature, proportion ... selection guide Select pH glass electrode carefully based on target application environment, incorrect selection will shorten ...