If the test solution contains soluble silver salts, monovalent mercury salts, or thallium salts, potassium chloride should not be used in the salt bridge. Saturated potassium nitrate or ammonium nitrate should be used to obtain satisfactory results. The non-aqueous solution is the application of sodium iodide in methanol and potassium thiocyanate in ethanol as the intermediate solution.
In short, the composition of salt bridge solution can not be precipitated with the measured solution, redox reaction phenomenon, otherwise it will interfere with the determination of electromotive force.
Such as double-liquid reference electrode in the determination of Cl concentration in the application.
Common signal display meter on the pH meter ProtEX RT6820 ...... Analog signal input / integrated display instrument input signal 4 ~ 20mA, Loop-Power loop supply voltage drop 2.8V, (with backlight 5.8V) Support Linear, Square Root, or Programmable Math Loop-Power Loop-Back or DC-Powered Backlight Optional ProtEX RT6830 ..... Pulse Signal Input / Integral Display Battery Powered, DC Powered, or Output Loop Powered Battery Power supply, DC power supply, or output circuit Backlight optional ProtEX_Lite PD663 Explosion-proof loop power supply process display Instrument input signal 4 ~ 20mA Voltage drop 1.7V, (with backlighting 4.9V) 3-1 / 2 + LCDS digital, 0.6 " Backlighting power supply option Fast four-key programming problem
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