Bosch 8733968186 A2L Sensor

- Detects refrigerant leaks in air handler units.

- Compatible with A2L refrigerants such as R-454B.

- Mounts inside the unit cabinet.

- Continuously samples air for rising refrigerant concentration.

- Signals system controls to shut down safely before unsafe buildup.

- Louvered front housing directs cabinet airflow across the sensing element.

- Arrives prewired with a sealed connector.

- Includes ample lead length for routing to the control board.

- Certified to UL and CSA standard 60335-2-40 for flammable refrigerant equipment.

- Alternate part number 8-733-968-186.

- BIVA-24RXB-M15X (2 ton).

- BIVA-36RXB-M15X (3 ton).

- BIVA-48RXB-M15X (4 ton).

- BIVA-60RXB-M15X (5 ton).

The Bosch 8733968186 A2L Sensor monitors air handler units for refrigerant leaks, giving systems that run on A2L refrigerants such as R-454B the early warning they need to shut down safely before a mildly flammable leak can build up. Mounted inside the cabinet, it continuously samples the air moving through the unit and signals the controls the moment refrigerant concentration climbs toward an unsafe level. The louvered front housing makes this possible, since the slotted openings let cabinet air flow straight across the internal sensing element for a quick, accurate reading instead of isolating the detector from the airflow it depends on. It arrives prewired with a sealed connector and ample lead length for routing to the control board, and it carries UL and CSA certification to the 60335-2-40 standard that applies to HVAC equipment using flammable refrigerants.