Skip to content
Join our FREE Concrete Scanning Workshop!
FREE Concrete Scanning Workshop!

Extech RD300: Refrigerant Leak Detector

by Extech

Detect Leaks from Air-Conditioning Units and Cooling Systems

For used and refurbished options, call 1 (770) 674-2489.


  • Product Overview
  • Technical Specifications
  • Resources
  • Accessories
  • The RD300 Refrigerant Leak Detector detects leakages from air-conditioning units and cooling systems. It's easy to use and is ideal for detecting leaks 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. Complete with leak test bottle, 9V battery, and protective hard carrying case.

    • 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
  • Specifications Range
    Detectable Refrigerants R‐22, R‐134a, R‐404a, R‐410a, and all CFCs, HCFCs and HFCs
    Sensor   Heated Diode
     Sensitivity Levels  High 0.25oz/yr (7g/yr)
    Medium 0.5oz/yr (14g/yr) 
    Low 0.99oz/yr (28g/yr)
    Warm up Time 90 seconds
    Auto Power OFF Automatic shut off after 10 minutes
    Low Battery Indication LOW‐BATT light switches ON
    Power Supply 9V Battery
    Battery Life 13 hours of continuous use 
    Operating Conditions 0°C to 50°C (32°F to 122°F) <80%RH
    Storage Conditions ‐10°C to 60°C (14°F to 140°F) <70%RH
    Flexible Probe Length 450mm (18")
    Dimensions 184 x 70 x 40 mm (7.2″ x 2.8″ x 1.6 ″)
    Weight 280g (10.0 oz.)

  • Links

  • List