testo 316-3 - Refrigerant Leak Detector

Order-Nr.  0563 3163

  • Patented heated diode sensor provides excellent sensitivity

  • High/low sensitivity adjustment and automatic zeroing

  • Easy one button operation

The testo 316-3, our best refrigerant leak detector yet, offers reliability, and features fast and easy resetting with automatic zeroing. Providing great sensitivity, and including the new refrigerant blends, this instrument will find the most refrigerant leaks, and it delivers dependable, rugged performance.


Product Description

The testo 316-3 is our best refrigerant leak detector yet, and delivers dependable, rugged performance at a great value. The heated diode sensor provides sensitivity down to 0.15 ounces/year including the new refrigerant blends like R-410A, R-407C, and R134-a, allowing you to quickly locate refrigerant leaks.
Just turn it on and start getting readings immediately. Thanks to automatic zeroing, the testo 316-3 is extremely fast, and can be used even in previously contaminated areas. The 316-3 has an LED indicator, automatic zeroing, and an audible alarm, all in a rugged housing.

Delivery Scope

testo 316-3, sensor head, transport case, calibration certificate, batteries, and filter

Technical Data

General technical data

Operating humidity

20 to 80 %rH


18 oz. (incl. batteries) / 500 g (incl. batteries)


10.6 x 2.4 x 2.4 in. / 270 x 60 x 61 mm

Operating temperature

-0.4° to 122.0 {٪S2} / -18 to +50 °C

Product colour



R22; R134a; R404A; R410A; R507; R438A; 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

32.0° to 122.0 {٪S2} / 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.

Rugged and Reliable Measurements to 0.15 ounces/year

The proven heated diode sensor provides great sensitivity. Just turn it on and start getting readings immediately. The 316-3 is extremely rugged and features a durable and oil resistant design and construction that is easy to use and extremely accurate


• Patented heat diode sensor of 0.15 ounces/year316-3

• High/low sensitivity adjustment

• Easy one button operation

• Automatic zeroing compensates for the background adjustment of refrigerant build-up

• LED indicator and audible alarm