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737K1 Combustible Gas Leak Detector
737K1 Combustible Gas Leak Detector

Provides personal protection from potential hazardous conditions and help find the source of combustible gases fast! 

Meets the requirements for latest NFPA 54 fuel gas purging requirements for large gas systems.

  • Internal Pump
  • Water/Dust Filter
  • Push Button Operation
  • Field Calibration
  • Date/Time Display
  • Calibration Alert
  • Operation Memory
  • Calibration Memory
  • Infrared Download
  • Audible/Visual Alarms
  • Backlit LCD
  • Programmable Auto Shut Off

Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

737K1 Data Sheet

737K1 Manual

$1,428.00 USA Suggested List Price 

Where to Buy TPI Products

737K1 NFPA 54 purge kit: measure leaks, LEL and % volume, includes A758 purge probe. For  use with Combustible Gases and optionally available Oxygen and Toxic Gases.
The Sensit® Gold 100 is designed to detect combustible gasses, oxygen content and toxic gases when so equipped with the available sensors.

 Model 737K1 Specifications
 Size  11.5” x 3” x 2.32” (292 x 76 x 69 mm)
 Weight  1.2 Lbs
 Operational Temp  0 to 120° F
 Storage Temp  -20 to 132° F”
 Battery Life  3 "C" size alkaline batteries - 16 Hrs. continuous

Model 737K1 Applications

  • Gas Leak Survey/Investigations
  • Confined Space Monitoring
  • Gas Emergency Investigations
  • Vessel Testing

Frequently Asked Questions

1. What is the difference between the HXG-2 and the 720b?
The HXG-2 is intrinsically safe and has an adjustable alarm.

2. Can I use the 720b or HXG-2 to test for carbon monoxide as well as combustible gas leaks?
The HXG-2 and 720b are designed to detect combustible gas leaks. The 735 or 775 are the best choices to test for carbon monoxide as well as combustible gas leaks.

3. What is the difference between the 735 and 775?
Both the 775 and 735 can be used to test for carbon monoxide in ambient air as well as test for combustible gas leaks. The 735 is pump driven and can be used to test for CO infurnaces as well. When testing for combustible leaks the 775 uses an audible “tic” and visual indication while the 735 has audible indicationand displays the leak level in %LEL.

4. I only need to test for combustible gas leaks, which detector should I choose?
The 725 is pocket sized with LED and audible indicators that activate at preset leak levels. The 725 can detect a leak but does nothave the capability to determine the source. The 720b and HXG-2 are more sensitive, utilize a thumb wheel adjustable “tic” rate, and have goosenecks that enable them to reach into tight areas and not only detect a leak but determine the source. The HXG-2 has an adjustable alarm and is intrinsically safe.

5. I need to be able to produce a “hardcopy” of test results. Do any of the TPI detectors have this capability?
Yes, the 735 has an infrared interface for printing testing results.

6. What gases can be detected?
Gases that can be detected include but are not limited to Acetone, Alcohol, Butane, Gasoline,Kerosene, Methane, Natural Gas, and Propane.

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