Campbell Scientific CS505 Fuel Moisture Sensor - Manual (Page 12)

CS505 Fuel Moisture Sensor
8
6. Maintenance
The sensor element should be changed at least once a year with a new element
in the spring. Since the characteristics of wood change so rapidly, more
frequent replacements may be desirable.
To change the sensor element, loosen the Phillips head screws and replace
with the new element. Tighten the screws after replacing the element.