Wall Mount FOB Beer Foam Detector - DFC 9500 SK016-096Avoid an embarrassing empty keg during busy serving times! This beer foam sensor stops beer flow immediately after your keg empties, so no customer is stuck with a foamy glass of beer a waste of product and profit! It keeps the line full of beer until a new keg is tapped. After changing kegs, beer flow can be restored with a twist of the wrist. Performance is consistent from the first to last pour. Warranty: 2 Years. High quality engineering grade