What does a sensor and alarm for A1 refrigerants (like R-12 and R-22) detect?

The primary purpose of a sensor and alarm for A1 refrigerants, such as R-12 and R-22, is to detect refrigerant leakage. A1 refrigerants are classified as low-risk in terms of flammability and toxicity, meaning they don't pose significant combustion or health hazards under normal conditions. However, their leaks can lead to operational inefficiencies and environmental concerns.

While options like high pressure, low temperature, and oxygen depletion are relevant to HVAC operations, they are not specific to the detection capacities of sensors for A1 refrigerants. High pressure typically relates to system malfunctions, low temperature is a normal operational measurement, and oxygen depletion can occur in enclosed spaces but is not a direct concern for A1 refrigerants. Thus, the sensor's main role focuses on ensuring safe operation by monitoring for refrigerant losses, thereby safeguarding against potential operational issues and environmental impacts.