Quadruple-Redundant Refrigerant Leak Detector


Quadruple-Redundant Refrigerant Leak Detector

The #RLD440 adds two new refrigerant leak indications to the conventional audible alarm and flashing light. UV LEDs on the probe tip glow when and where they detect a leak of fluorescent dye injected into an HVAC/R system. A proprietary semiconductor sensor then approximates the size of the leak and displays its severity as a number from 1 to 9.


Best For:



  • Detects all commercially available HFC, HFO, HC, HCFC and CFC refrigerants
  • The only refrigerant leak detector on the market that complies with all five pertinent testing standards: SAE J2791, J2913 and J1627, the new European standard EN14624:2012, and ASHRAE’s Halocarbon Refrigerant Leak Detector Stand
  • Quadruple-redundant leak indicators: UV dye fluorescence, a loud fast beep, a bright flashing LED, and a unique digital leak size reading
  • A true mechanical pump draws in samples, increasing sensitivity
  • Automatic calibration and reset to ambient levels
  • Three sensitivity levels
  • Fast warmup
  • Garage-durable construction
  • Made in the U.S.A.
  • Specifications


    • Refrigerants detected: R-134a, R-410a, R-404a, R-407c, R-507, CFC-12 (R-12 or Freon-12), R-22 (Freon), R-290, R-441A, R-600a, R-1234yf
    • Sensitivities: 0.05 oz./yr (1.4 g/yr) to R-134a; 0.025 oz./yr (0.7g/yr) to R-22
    • Warmup time: <20 seconds
    • Sensor life: >300 hours of operation (ten years’ normal use)
    • Battery life: Five hours of continuous operation (typical)
    • Display size and type: 0.6 in. (15mm) high 7-segment red LED
    • Probe length: 17 in. (432mm)
    • Weight: 1.5 lb. (680g)
    • Power source: Four "AA" batteries (included)


    • Leak check vial
    • Five spare sensor filters
    • Batteries
    • Custom hard plastic carrying case
    • 2-year limited warranty (including sensor)


    • 6.8 x 2.6 x 2.2 in. (173 x 66 x 56mm)