Propane detectors can be a nuisance, but they will sound off if propane or any similar gas is present long before you will smell it! Lifespan does vary given it has the quality control typically found in the RV industry.
Remember propane is used as a propellant in many household sprays and it will sing in the presence of some odorants.
Steve and Andra
2012 F350 6.2 gasser SRW LB
Fab Fours front and rear in case we run into a rhino
2019 Northstar Laredo SC