Freon Gas Alarm (Refrigerant Leak Alarm)
# Freon Gas Alarm (Refrigerant Leak Detector) Freon alarms are used to detect leaks of refrigerants such as R22, R134a, R410A, and R507; most Freon gases are heavier than air, so after a leak they settle on the ground, and high concentrations can pose an **asphyxiation risk**. Some refrigerants (R32, R290) are also flammable. The entire system consists of a **detector (sensor) + alarm controller**, which can provide audible and visual alarms, activate exhaust fans, shut down refrigeration units, and upload alarm signals to the duty room. ## 1. Comparison of Sensor Principles (Key for Selection) Table
