1-800-892-9650 SEARCH
Item Detail

Table of Content Heating & Air Conditioning A/C & Heating Testing Equipment

Image shown may not
be actual product.
Product and price information are
subject to change without notice.
Refrigerant Leak Detector
Model: WTTJ2791

Call 1-800-892-9650


The J2791 features a long-life heated sensor technology that is designed to detect the more current and difficult HFC refrigerants such as R-134a and R-1234yf (134a and 1234yf) in addition to all HCFC and CFC refrigerants, including hydrocarbon blends. Capable of finding very small to moderate leaks. The J2791 does not require rechargeable batteries.


  • Certified for SAE J-2791, SAE J-1627 and J-2913
  • Long-life, stable sensor
  • Unique numeric leak size indicator
  • Three adjustable sensitivity levels
  • Visual LED leak alarm located near sensor
  • True mechanical pump
  • Low battery indicator
  • Uses 4AA alkaline batteries
  • Audio mute function
  • Comfortable neoprene grip
  • CE Certified
  • Rugged carrying case included
  • Made in the USA


90 Days.

Product Specification


.05 oz./yr. R-134a

Static Sensitivity

.025 oz./yr. R-1234yf

Sensor Life

>300 Hours

Response Time


Battery Life

8 Hours Continuous

Warm-up Time

<20 Seconds

Probe Length


Numerical Display

7 Segment Digital Display (1-9)


1.5 lbs.


14 x 10-1/2 x 3-1/2

Tool Requirements

Tool Number WTTJ2791
Availability Available
Superseded To
Tool Class Special Tools
VW US Requirement Optional
VW US Auto Ship Number
AUDI US Requirement Optional
AUDI US Auto Ship Number
VW Canada Requirement Optional
AUDI Canada Requirement Optional

Invisible Button