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testo 316-3 - Refrigerant leak detector

0563 3163
  • Patented heated diode sensor provides
    excellent sensitivity 
  • High/low sensitivity adjustment and automatic zeroing 
  • Our best refrigerant leak detector suited to find most refrigerant leaks
  • Easy one button operation 
  • The Testo 316-3 is our best refrigerant leak detector 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.

    testo 316-3 leak detector – benefits at a glance

    • Can detect all common refrigerants: CFCs, HFCs, FCs
    • Highly sensitive sensor ( < 4 g/a - 1g/a according to DIN EN14624:2012 standard) - can detect even the smallest leaks
    • Ready for use – there’s no need to select cooling agent characteristics first
    • Automatic zero setting – can detect leaks in rooms that are already contaminated
    • Visual and audible alarm which are activated when a leak is detected
    • Quick and easy sensor change 

    testo 316-3 refrigerant leak detector for cooling agents, sensor head, carry case, protocol certificate, batteries, filter.

    General technical data

    Operating humidity
    20 to 80 %RH
    500 g (incl. batteries)
    270 x 60 x 61 mm
    Operating temperature
    -18 to +50 °C
    Product colour
    R22; R134a; R404A; R410A; R507; R438A; and all CFCs, HFCs, and HCFCs
    Life-time sensor
    Approx. 80 to 100 h (corresponds to approx. 1 year)
    4 g/a (0.15 oz/a)
    EN 14624:2012; SAE J1627
    Battery type
    2 x D
    Battery life
    16h permanent operation
    Storage temperature
    0 to +50 °C


  • Accessories
    No picture available
    Sensor head for the testo 316-3
      0554 2610

    • Sensor change by customer

      The simple design of the testo 316-3 enables the sensor to be changed in just a few seconds and means the sensor is always ready for use.

      testo 316-3

      Tightness testing of refrigeration systems

      The testo 316-3 meets all the requirements of the F gases regulation thanks to the high sensitivity of 4 g/a. This means you can find every leakage – no matter whether it involves an R22, R134a, R410a or another refrigerant.

      testo 316-3