Bard 8406-093 - Differential Pressure Switch

Bard part number 8406-093 is an OEM differential pressure switch that is designed to open on a rising pressure differential, helping the unit monitor airflow conditions and protect operation when the expected pressure signal is not present. Differential pressure switches like this are commonly used across air-moving sections to verify blower operation, sense filter or airflow restriction, or confirm proper draft or pressure conditions depending on the Bard wall-mount configuration. Replacing a weak or out-of-tolerance switch with the correct Bard OEM part helps restore reliable proving logic and reduces nuisance shutdowns. Because setpoints and tubing/port connections vary by model, match 8406-093 to your unit model and serial and verify the pressure rating and wiring style before ordering.

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