• RD300
  • Manufacturer has 4 in stock
    This stock is typically available to ship in 3 - 5 working days.



  • Detects all standard refrigerants using a heated diode sensor
  • LED light at probe tip
  • LEDs display user-selectable High/Medium/Low levels
  • Audible and Visual alert with mute button
  • Field replaceable sensor (RD300-S) and LED light tip (RD300-L)
  • Low battery indicator

What's in the Box

  • Leak test bottle
  • 9V battery
  • Protective hard carrying case


The Extech RD300 Refrigerant Leakage Detector is easy to use and is ideal for detecting leakages from air-conditioning units and cooling systems that use all standard refrigerants. The multi-colored LED light bar indicates the level of leaking refrigerant detected by the RD300. The built-in, bright LED convenience light located at the sensor tip illuminates dimly lit inspection areas.


This product can be used in the following applications: