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316-3, Refrigerant Leak Detector (-4°F to 122°F)

The testo 316-3 is our best refrigerant leak yet that delivers dependable, rugged performance at a great value. The proven heated diode sensor provides great sensitivity down to 0.15 ounces/year including the new refrigerant blends like R-410A, R-407C, and R134-a, allowing you to find the most refrigerant leaks.

Just turn it on and start getting readings immediately to find the most refrigerant leaks. Thanks to the automatic zeroing, the testo 316-3 is extremely fast and can be used even in previously contaminated areas, making it our best refrigerant leak detector yet. The 316-3 has an LED indicator, automatic zeroing, and audible alarm, all in a rugged housing.

  • Patented heated diode sensor provides excellent sensitivity
  • High/low sensitivity adjustment and automatic zeroing
  • Our best refrigerant leak detector yet to find the most refrigerant leaks
  • Easy one button operation

  • Testo 316-3
  • Sensor Head
  • Transport Case
  • Calibration Certificate
  • Batteries
  • Filters
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Manuals (2)
Product Type:

Leak Detector




Refrigerant Detection

Operating Temp Range:

-4° to +122°F

Operating Humidity:

20 to +80 %rF


2 Years


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