For all these requirements, point detectors such as the MGS-150, MGD-100 or even the latest MGS-400 series are commonly used, as these detectors comply with regulatory requirements such as EN378.
However, these detectors have a sensitivity that will not detect the smallest of leaks. This inevitably means that the detection system will not respond even though some refrigerant is leaking, albeit at a non-hazardous level.
The user only recognizes this "very small" refrigerant leakage by the fact that refrigerant has to be refilled at certain intervals. Thus, from a purely economic point of view, these small leaks are large losses that could be reduced by a highly sensitive refrigerant warning system.