... 3.4~20mA NDM-99 Concentration Meter Brief Specification l General introductionAcid, alkali, salt concentration transmitter is a kind ... cleaning process monitoring, environmental protection and other industrial processes.l Features1. Solve the case of electrode polarization, contamination ... output overload, the maximum current does not exceed 30 mA. l Technical parameterScale0.1% ~ 15% HCL, H2SO4, HNO3, ...