Testo Refrigerant Leak Detectors
Discover the best refrigerant leak detectors to ensure accurate detection and enhance safety. Read our article for essential tips and recommendations.
Find out more about Testo Refrigerant Leak Detectors below.

- Detects multiple refrigerant types
- Progessive LED showcases leak strength
- High adjustable sensitivity

- Automatic programs
- Bluetooth connectivity
- Compact, lightweight, and robust

- Bluetooth connectivity
- Compact, lightweight, and robust
- Three automatic charging programs

- Detects CFC, HCFC, HFC and H2 or NH3, Ammonia
- Flexible gooseneck probe with sensitivity of <3g/a
- Audible and visual indicator with trend display

- Optimised for refrigeration engineers
- Troubleshoot, service and install air conditioning and refrigeration systems
- Designed for use with a smartphone or tablet and the Testo Smart Probe App
What are Testo Refrigerant Leak Detectors?
Testo Refrigerant Leak Detectors are handheld instruments designed to identify and locate leaks in refrigeration and air conditioning systems. They are essential tools for HVAC technicians and maintenance professionals who need to ensure the integrity of cooling systems.
What Do Testo Refrigerant Leak Detectors Measure?
These detectors identify the presence of refrigerant gases escaping from systems. They are capable of detecting a wide range of refrigerants, including:
- CFCs (e.g., R-12)
- HCFCs (e.g., R-22)
- HFCs (e.g., R134a, R404A, R410A, R507)
- Blended refrigerants (e.g., R-407C, R-438A)
- Hydrogen (H?)
- Ammonia (NH?) with specific sensor heads
How Do Testo Refrigerant Leak Detectors Work?
These detectors operate by sensing the presence of refrigerant gases in the environment. The heated diode sensor, like in the Testo 316-3, ionises refrigerant molecules, producing a measurable current that indicates a leak. The device provides immediate feedback through LED indicators and audible alarms. The Testo 316-4 continuously monitors the electrochemical sensor's status and alerts the user to any malfunctions or contamination, ensuring reliable operation.
Applications of Testo Refrigerant Leak Detectors
Testo Refrigerant Leak Detectors are widely used in various settings, including:
- HVAC Systems: Detecting leaks in residential and commercial air conditioning units.
- Refrigeration Units: Ensuring the integrity of supermarket display cases and cold storage facilities.
- Automotive Industry: Identifying leaks in vehicle air conditioning systems.
- Industrial Cooling: Maintaining large-scale refrigeration systems in manufacturing plants.
These detectors help professionals maintain system efficiency, comply with environmental regulations, and prevent costly refrigerant losses.