Smoke Fluid Systems from Superior Signal are used to find faults and sources of surface water inflow in collections systems. The smoke fluid is both high quality and economically priced. All blowers are engineered for smoke testing, using a double-insulated heating chamber with stainless steel injector to maximize dry smoke output, and produce the best-quality liquid-based smoke. Blowers can also be configured to work with Superior Smoke Candles. 800/945-8378; www.superiorsignal.com; Booth #4110.