... Accuracy: ±0.2mVIon Concentration Range: 0 to 19999ppm (Based on Ion Selective Electrode Range)Ion Concentration Accuracy: ±0.5% F.S (Monovalent), ±1% F ... )mmWeight: 1.7kgMeter Included:pH Electrode (Made in UK), ORP Electrode, pH Buffers, Temperature Probe, Power Adapters BANTE930 Ion meter, pH Meter, ORP ...