testo 316-3 - Refrigerant leak detector

Order-Nr.  0563 3163

Price on Request
  • 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. 


Product Description

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 

Delivery Scope

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

Technical Data

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


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.

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.

Price on Request