Bench type, RS23/USB, Data logger pH/ORP, DO, CD/TDS METER Model : WA-2015 * Professional bench meter for multi-function: pH/ORP, Conductivity/TDS, Dissolved oxygen. * pH : 0 to 14.00 pH. * ORP (mV): 1,999 mV. * Conductivity: 200 uS/2 mS/20 mS/200 mS. * TDS: 200/2,000/20,000/200,000 PPM. * Large LCD with green color backlight. * ATC (automatic temperature compensation). * Real time 16,000 no. data logger. * Data hold, Record (Max., Min.), RS232 * Optional electrode : pH electrode, ORP electrode, CD/TDS probe, Dissolved oxygen probe, pH ATC probe. * DC 1.5V (UM-3, AA) x 8 PCs or DC 9V adapter in.