This combined one-rod measurement chain (platinum and reference electrode in a shaft) has a dirt-resistant glass fiber bundle with polymerized fixed electrolyte. A double chamber with double diaphragm seal prevents electrode toxins such as sulphides, amines or chromates from damaging the reference electrode. The additional salt template in the form of rings improves the service life of low-ion media or at high flow rates. The one-rod measuring chain has been developed especially for use in chromate reduction, nitrite oxidation, swimming pool and drinking water disinfection with slightly contaminated media. It can be used for a redox range of plus/minus 1500 mV and has a temperature resistance of -5 to +90 °C. Installed length 120 mm.This text is machine translated.