Oxygen sensors are wear parts and must be replaced periodically.
The oxygen sensors used by Submatix are manufactured by Analytical Industries USA. (Type PSR-MDSX 11-39)
To prevent the moisture from getting into the cabling, we use a sensor with two pin female Molex connectors with gold contacts.
At the sensorterminal in the sensor head there are male Molex connectors with gold plated contacts. These are housed so that no moisture can penetrate into the wiring.
Therefore all the wiring is effectively protected against moisture.
