Can the RH sensor’s PCB be cleaned with Isopropanol?
Sensor will become inaccurate if exposed to the fumes from Isopropanol. Generally no clean PCB is recommended. If cleaning is required, use deionized water after using water soluble solder flux with the sensor’s protective cover in place. Water pressure must be kept low to maintain the integrity of the protective cover and not allow entry of water into the sensor cavity, there is a 15 PSI max limit. Leave some PCBs uncleaned so that the cleaned boards can be compared for an accuracy check.