The BAPI Differential Pressure Switch is ideal for air filter monitoring, static pressure proving, airflow proving or auxiliary fan actuation. Because of its UL 353 Limit Control Listing, the BAPI Switch can be used in safety circuits to protect heating appliances, heating systems, processessing systems and HVAC/R systems.
  The setpoint is field adjustable from 0.1" to 35" W.C, and the unit can measure positive pressure, vacuum or true differential pressure. The seven pressure ranges are field selectable by changing a color-coded spring. The spring for the range that you order is preinstalled, and the other six springs are shipped with the unit so that you can change ranges in the field if you choose.
  The unit features a rugged plastic enclosure that protects the electrical terminations and pressure adjustment screw which is easily accessed through a port in the front cover. The quick connect wiring terminations are accessed by opening the hinged cover. The unit is very compact and can be mounted directly on a flat surface with the rugged mounting feet, and the pressure barbs accept 3/16" or 1/4" tubing.
  The unit also features an extremely high proof pressure of 100" W.C. so that it will continue to function properly even if it is accidently connected to an unusually high or low pressure.

Datasheets (PDF) Differential Pressure Switch Datasheet with Ordering Grid List Pricing (PDF) Differential Pressure Switch List Pricing

Installation and Operation Sheets (PDF) Differential Pressure Switch Installation & Operation Sheet

VISIO Files (2002 version) Half Scale Differential Pressure Switch VISIO File (432K) Full Scale Differential Pressure Switch VISIO File (3.5 Meg) VISIO Files (2003 version) Half Scale Differential Pressure Switch VISIO File (70K) Full Scale Differential Pressure Switch VISIO File (300K)

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Pressure Probe Assemblies The Static Pressure Probe and Total Pressure Probe Assemblies connect to the BAPI Differential Pressure Switch or the BAPI Zone Pressure Sensor to provide duct static or total pressure.

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Pressure Pickup Ports BAPI makes a full line of Room, Wall and Ceiling Pressure Pickup Ports, as well as an Outside Air Pressure Pickup Port, to accompany the Differential Pressure Switch and the Zone Pressure Sensors. The Room and Wall units can be used for pressure alone or as a combination temperature sensor and pickup port.