1. Home
  2. testo 316-3
0563 3163

testo 316-3 - Refrigerant leak detector

Image
testo 316-3
testo 316
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. 
  • 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 
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 

General technical data

Operating humidity
20 to 80 %RH
Weight
500 g (incl. batteries)
Dimensions
270 x 60 x 61 mm
Operating temperature
-18 to +50 °C
Product colour
Black
Detectable
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)
Sensitivity
4 g/a (0.15 oz/a)
Standards
EN 14624:2012; SAE J1627
EU-/EG-guidelines
2004/108/EG
Battery type
2 x D
Battery life
16h permanent operation
Storage temperature
0 to +50 °C
testo 316-3 refrigerant leak detector for cooling agents, sensor head, carry case, protocol certificate, batteries, filter.

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.

Testo - Head Office
Testo Pty Ltd
Unit 11, 114-118 Merrindale Drive
Croydon SouthVictoria 3136
Australia
+61 (0)3 8761 6108+61 (0)3 4100 0438
Testo - Service Centre
For all calibration and repair services.
Unit 1, 10-12 Sigma Drive
Croydon South Victoria 3136
Australia
+61 (0)3 8761 7108

You can reach us by telephone during these hours:

Mon - Fri: 9:00 - 17:00 (AEST)
Image
Blog

Visit our blog

© 2026