What is the difference between inertia and obstruction sensing in autoamtic driveway gate openers?

Some automatic driveway gate openers have both inertia and obstruction sensing. The difference between the two is the obstruction sensing on your automatic driveway gate opener changes how sensitive your gate will be to an obstruction.  You can set it to detect an obstruction at a low level of interference or high.  Inertia comes into play after the automatic driveway gate opener has detected an obstruction.  It is the level of pressure the automatic driveway gate opener will exert to push through the obstruction.  It can be set to no force or enough force to push through minor debris. Just remember inertia is void until an obstruction has been detected.