FOB Detectors (Foam-on-Beer Detectors)

FOB Detectors — Stop Wasted Beer When a Keg Kicks

On a long draw system, when a keg blows, the beer line fills with foam before the next keg takes over. Without a FOB detector, that foam has to be purged — wasting a full line's worth of beer every single keg change. On a busy bar with multiple long draw lines, that adds up fast.

How a FOB Works

A Foam-on-Beer (FOB) detector is installed in the walk-in cooler, inline between the coupler and the trunk line. When the keg kicks and foam enters the FOB chamber, a float drops and automatically shuts off beer flow. The line stays full of beer — not foam. When the new keg is tapped, you reset the FOB and pour immediately, with no purge required.

The ROI Is Real

• A standard long draw line holds 1–2 pints of beer between the keg and the faucet
• Without a FOB, that beer is wasted as foam on every keg change
• A busy bar changing 5–10 kegs per week can recover hundreds of dollars in product annually per line
• Most FOBs pay for themselves within weeks of installation

What We Carry

• Pacific FOB detectors — the industry standard; durable, easy to reset, widely compatible
• Replacement floats & seals — keep your existing FOBs performing correctly
• Mounting brackets & hardware — for clean walk-in cooler installations

FOB detectors are required on all properly built long draw systems. If your system doesn't have them, it should.