Technical Datasheet: Johnson Controls P33AB-9200 Pressure Switch

The P33AB-9200 is a high-precision differential pressure switch manufactured by Johnson Controls. Designed for monitoring low pressures of air and non-aggressive gases, it is commonly used in HVAC systems for filter monitoring, fan status indication, and air flow control.

1. General Specifications

• Manufacturer: Johnson Controls

• Model Number: P33AB-9200

• Origin: Made in Holland

• Compliance: DIN DVGW REG. NO.

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2. Electrical Characteristics

Parameter	Value
Contact Rating	5(2) A 250 V~
Switch Type	Single Pole Double Throw (SPDT)
Environmental Protection	IP 54

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3. Performance & Pressure Data

• Operating Range: 0.8 / 6 mbar

• Maximum Pressure ($p_{max}$): 300 mbar

• Ambient Temperature Range: -15 / 60 °C

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4. Functional Features

• Pressure Connections: Features two plastic nozzles marked (+) for high pressure and (-) for low pressure or vacuum.

• Mounting: Rectangular housing designed for easy integration into control panels or air ducts.

• Versatility: Suitable for sensing differential pressure, overpressure, or vacuum.

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5. Application Focus

• HVAC Systems: Monitoring air filters and checking for clogged conditions.

• Industrial Ventilation: Ensuring fan and blower operation through air flow detection.

• Burner Controls: Low-pressure monitoring in combustion air supply lines.