AVTECH's Air Flow 1 Sensor (NC) provides real-time recognition of air flow stoppage. This Air Flow 1 Sensor (NC) is normally closed and includes a mounting clip and clamp. Typical use is to monitor continuous air flow in an HVAC duct, under a raised floor, or near a fan on a rack cabinet or important server. This sensor is equivalent to Stego Air Flow Switch #01300.0.