Refrigerant Leak Detector Extech RD300

Detects all standard refrigerants using a heated diode sensor LED light at probe tip (with on/off switch) for working in dimly lit areas LEDs display user-selectable High/Medium/Low levels with sensitivity of 0.25/0.50/0.99 oz per year Audible and Visual alert with mute button Low battery indicator Field replaceable sensor and LED light tip Complete with leak test bottle, 9V battery, and protective hard carrying case