Airflow sensor assembly for monitored heat exchanger system

An airflow sensor assembly for a monitored heat exchanger system, the sensor comprising:

• a casing comprising:
• a casing outer surface, a casing inner surface, a casing topside, and a casing bottom side, and a casing opening;
• a mounting frame disposed proximate to the casing bottom side;
• a guard disposed proximate to the casing topside;
• a shaft centrally positioned within the casing opening;
• a support platform disposed around the shaft;
• a plurality of assembly screws disposed through the casing, the mounting frame, and the guard;
• a plurality of fasteners configured for connecting with the plurality of assembly screws;
• a first bearing disposed around the shaft in a bearing annulus between the shaft and the support platform;
• a second bearing disposed around the shaft in a bearing annulus between the shaft and the support platform;
• a shim disposed around the shaft and between the first bearing and the second bearing;
• a circuit board coupled to the support platform, the circuit board being configured with an operable logic circuit further comprising a microcontroller, a Hall effect sensor, and a transceiver;
• a first lock nut threadingly engaged around the shaft to in an amount sufficient to engage the second bearing;
• an inner sensor housing disposed around the shaft, the inner sensor housing configured to extend out and around the circuit board and the support platform;
• at least one magnet coupled with the inner sensor housing;
• a rotating member comprising a plurality of blades disposed around the shaft;
• and
• a second lock nut threadingly engaged around the shaft sufficiently enough to engage the rotating member.