As for the sensors being sensitive to moisture and such, we had one installed near the bilge in the engine compartment. We had our engine overheat (a completely different story <sigh>) causing the coolant to boil over and fill the engine compartment with steam. This triggered the propane detector, which just added a sense of panic to an already crappy situation. Now we know about this sensitivity, so no big deal, but it was a moment of urgent dread.
On a related note, I'm not sure about the usefulness of putting a detector in the propane locker itself - assuming that is where the solenoid is located. Of course, it is not wrong, and it does serve a purpose. But, if I were to disable a sensor temporarily (as Dave describes), that would be the first one I disabled. This is because, if there is a leak in the locker, it is almost certainly upwind of the solenoid. So, closing the solenoid will not help. Obviously, the alarm itself is useful information. So, having the detector is certainly better than not.
Yet, if the locker is properly vented, you could have a leak in the locker that never triggered the detector.
I am super cautious about propane, so we shut the cylinder off when not in use. The remote solenoid switch (in the galley) is really just a backup for us. The cylinder gets turned on before using the stove and turned off when dinner is served. And, the propane locker stays open when the cylinder is open. So, we don't have a sensor in the locker.
I realize that's a tangent to the original question. But, I do think that disabling that sensor with a jumper is completely acceptable, particularly as a temporary measure, since you can easily mitigate any danger by simply closing the cylinder when not in use.
