LDR-930 is a high accuracy meter used to measuring pH, Oxidation-Reduction Potential and ion concentration. :: Ion concentration mode directly ... interface can be sent data to PC METERS INCLUDED:pH and ORP Electrode, pH Standard Buffer, Temperature Probe, Power Adapters, Electrode ... 2mV Temperature Range0~100oC, 32~212oF Temperature Accuracy±0.3oC pH Calibration Points2 points, NIST, pH4.00/6.86/9. ...