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General Tools RLD400 Refrigerant Leak Detector


Product Description

The modern, electronic way to maintain mobile and stationary air conditioners, refrigerators, chillers and heat pumps! The new, proprietary semiconductor sensor detects many new ozone layer-friendly refrigerants approved under the U.S. EPA's Significant New Alternatives Policy (SNAP).

Why look for refrigerant leaks? There are three reasons to detect and repair leaks of refrigerant gases from stationary and mobile air conditioners, refrigeration systems and heat pumps:

1. Leaks allow air and moisture to enter an A/C system or chiller. Moisture can react with refrigerant to form corrosive acids and sludge that can damage a compressor, plug up orifice tubes, and/or eat pinholes in evaporators and condensers.

2. Refrigerant is expensive. It may seem cheaper to keep recharging your system with refrigerant than fix a leakbut it isnt in the long run. And A/C systems and chillers that arent fully charged wont cool efficiently and thus waste money (electricity-powered systems) or fuel (vehicle systems).

3. Most refrigerants deplete the ozone layer that blocks the Sun's harmful ultraviolet radiation. In the U.S., the Clean Air Act of 1990 and later amendments require owners or operators of refrigeration and air-conditioning equipment with refrigerant charges greater than 50 pounds to repair leaks within 30 days when those leaks result in the loss of more than 15% (comfort cooling) or 35% (commercial cooling) of the charge over a 12-month period.


  • Proprietary sensor with lifetime of >300 hours of operation (ten years normal use)
  • Detects all commercially available HFC,HFO, HC, HCFC, and CFC refrigerants
  • Triple-redundant leak indication(loud fast beep, bright flashing LED, digital leak size reading)
  • True mechanical pump draws in samples, increasing sensitivity
  • Sensitivity of 0.05 oz./year (1.4 g/year) to R-134a
  • Automatic calibration and reset to ambient levels
  • Three sensitivity levels
  • Fast warmup
  • Padded hard plastic case
  • Garage-durable construction
  • Leak test vial sampler
  • Made in U.S.A.
  • 2-year warranty includes sensor


Refrigerants Detected: R-134a, R-410a, R-404a, R-407c, R-507, CFC-12 (R-12 or Freon), R-22, 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
Sensor Type: Proprietary solid electrolyte semiconductor
Warmup Time: 17-20 seconds
Display Type, Size: 7-segment red LED, 0.6 in. (15mm) high
Dimensions of Instrument: 6.8 x 2.6 x 2.2 in. (173 x 66 x 56mm) w/17 in. (432mm) probe
Weight of Instrument: 1.5 lb. (680g)
Certified to comply with ASHRAE Halocarbon Refrigerant Leak Detector Standard 173-2012
Certified to comply with SAE Standards J2791, J2913 and J1627
Certified to comply with European Standard EN14624
Power Source: 4 AA batteries (included)
Battery Life: 5 hours continuous operation (typical)


Leak Test Vial
(5) Spare Sensor Filters
(4) AA Batteries
Hard Plastic Carrying Case
Users Manual

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6.00 LBS
Calculated at checkout