D640 - Nitrogen / Hydrogen Tracer Gas Leak Detector

The D640 utilizes a solid-state heated sensor designed to be highly sensitive to Nitrogen/Hydrogen tracer Gas. The tracer gas mixture complies with Article 6, Paragraph 3 of EU Directive 2006/40/EC. The instrument will detect tracer gas leaks that are smaller than 5ppm in size. The unique digital display allows for quick and precise pinpointing of the leak source and it indicates the relative size of the system leak. It is CE Certified, and is housed in a rugged ABS high impact plastic case. It is powered by four AA alkaline disposable batteries and does not require rechargeable batteries.


  • Numeric leak indicator alarm
  • Automatic calibration
  • 3 sensitivity levels
  • Low battery indicator
  • Uses 4 AA alkaline batteries
  • Audio mute function
  • Comfortable Sanaprene grip
  • CE Certified
  • Long life sensor
  • 2 year warranty

D640 Specifications

Model # D640
Name Leak Detector, N2/H2 Tracer Gas
Sensitivity <5ppm
Sensor Life >300 hours
Power Supply 4 AA Alkaline batteries
Battery Life 8 hours continuous
Warm up time  
Probe length 17 inches
Numerical Display 1 to 9
Weight, lbs 1.25 lbs
Warranty 2 years


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