Johnson Controls A99BB-400 Temperature Sensor This 36-inch tube provides the

This 36-inch tube provides the necessary coverage for mid-size commercial ductwork

For customized level detection

This OEM furnace pressure switch serves as a calibrated safety limit

Common Questions Is this cover compatible with other pneumatic series

If the inducer fails to maintain the specified negative pressure

Johnson Controls A99BB-400 Temperature Sensor This 36-inch tube provides theThe Johnson Controls A99BB 400 Temperature Sensor is a precision PTC silicon sensor engineered for high accuracy temperature monitoring in commercial refrigeration and HVAC systems. Designed for seamless integration with System 450 controls and Penn A419 A421 series controllers, this thermistor style sensor features a linear resistance to temperature output, minimizing calibration drift in the field. The A99BB 400 is equipped with a 13 foot PVC cable