Three bubble leak detection fluids have been modified to better detect leaks on systems containing higher-pressure HFCs and the more aggressive refrigerant blends. “Big Blu” can detect gas leaks at rates approaching 0.65 oz/yr, the company says; “Super Blu” has a working temperature range of -30° to 200°F; and “Brush-on Blu” features a redesigned dauber with handle and telescopic stem.

Refrigeration Technologies, P.O. Box 3571, Fullerton, CA 92834; 800-869-1407 or 714-870-8361; 714-526-4598 (fax); (Web site).