Elitech CLD-100 Refrigerant Halogen Leak Detector Gas Air HVAC Tester CFCs HCFCs HFCs Detects all kinds of halogen refrigerants. Sensitivity can be adjusted at any time and the detector can be adjustedautomatically to the best state of detection. Inner precise IC with ultra-low circuit consumption offers more stable function and lengthens battery life. Dual-color visual display of battery voltage. Excellent sensor brings high sensitivity and long service time.