Product review (5 stars): This is RPWFE compatible with peeling and reattaching the sensor to this one.
This is RPWFE compatible.  You will need to peel off the sensor on the more expensive one and apply to this one. Sticks on just fine.  It will not "reset" the time left, but it comes with a sticker to put on for reminder of changing.  It says its good for 200 gallons or 6 months.  I usually change on taste alone.  There is only two of us. I'm going to order more.  3 for the price of 1.