Lutron WA-2015 multi-function professional bench meter has pH/ORP / DO and CD/TDS function, large LCD with green color backlight, automatic temperature compensation, 0 to 14.00 pH, ORP 1999 mV, conductivity 200 uS/2 mS/20 mS/200 mS, TDS 200/2000/20000/200000 PPM, RS23 / USB connectivity, real time 16000 no data logger,
data hold and record RS232, DC 1.5V x 8 PCs or DC 9V adapter in. Made in Taiwan.