◈ Primary Specs ▶ Range / Resolution / Accuracy   ● pH: -2.00~16.00 pH / 0.01 pH or0.001pH(selectable) / ± 0.1% ± 1 digit  ● mV : -1999~1999 mV / 1 mV or 0.1mV(selectable) / ± 0.1% ± 1 digit  ● Ion: 0.00~25.00 conc. / 0.05 conc. / ± 2 LSD  ● Ion: 25.0~50.0 conc. / 0.1 conc. / ± 2 LSD  ● Ion: 50.0~119.8 conc. / 0.2 conc. / ± 2 LSD  ● Temp.: -5.0~125.0 °C / 0.1°C / ± 0.5 °C ◈ General ▶ pH buffer recognition model: ▶ 6250 - pH 7.00,4.01,10.01 / 6250C - pH 6.86,4.00, ▶ pH standardization: Dual point standardization ▶ Ion standardization: Single or dual point standardization ▶ pH temp. compensation: Auto/manual -5.0 to 125.0°C ▶ pH buffer temp. range: 0 to 50.0°C ▶ pH electrode offset recognition: ± 90 mV at pH 7.00 or 6.86 ▶ pH electrode slope recognition: ±30% at pH4.00,9.18 or10.01 ▶ Input Impedance: Greater than 1012 Ohms ▶ ATC probe: Thermister,10 kilo Ohms at 25°C ▶ Communication: RS-232C output ▶ Audio feedback: All touch keys ▶ Display ph/me/temp: 15mm/7.5mm high LCD ▶ Ambient temp. range: 0 to 50.0°C ▶ Power supply: battery6 AAA batteries/AC adaptor ▶ Power backup: Memeory backup ▶ Battery life (alkaline): 25 hours or so ▶ Dimensions: 83mm X 241mm X71mm ▶ Weight: 450gms (batteries included)