The testo 316-4 (Set 1) is a fast and reliable leakage detector for all common refrigerants. The sensor is permanently monitored and shows malfunctions or contamination in the display. The use of test leaks is thus superfluous.
Very long sensor life
Optical and audible alarm
Permanent sensor check
Easy sensor change by the user
Earplug socket for secure localization of leakages in loud surroundings