Online Acidity/Alkalinity Concentration Monitor 1.Scale:0~15% HCL,H2SO4,NaOH,HNO3 ... Temperature:-10~100 3.4~20mA Online Acidity/Alkalinity Concentration Monitor General introductionAcid, alkali, salt concentration transmitter is a ... No traditional electrodes. Use inductive sensors, modular electronic unit, earthquake proof, non-distributed capacitance and electromagnetic effects, anti-interference.4 ...