UView’s Smart-Gauge (580500) conducts an instant performance test on A/C systems by measuring ambient and A/C vent temperatures. Smart-Gauge comes with a troubleshooting guide for easy diagnosis and repair of common problems. This Tech-Tip guide is written for and by professional cooling system repair techs. Smart-Gauge is specially designed for vehicles with variable displacement compressors where manifold gauges could misdiagnose refrigerant charge levels. Its micro-processor instantly determines A/C system performance. The Smart-Gauge attaches to a manifold gauge set or suspends from hood latch or attaches; reads in Fahrenheit or Celsius; and includes ambient and vent temperature probes. Visit www.uview.com.