HVAC Differential Pressure Switches

Filter alarms, fan monitoring and water-circuit switching for HVAC systems from Produal and Beck.

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Differential Pressure Switches Subcategories

Brand

A–Z

adjustable from 40 to 1000 mbar

About this category

In HVAC systems, differential pressure switches are the everyday safety and maintenance devices of the air handling unit.

Filter alarms: signal when a filter's pressure drop shows it needs changing.
Fan proving: confirm that a fan is moving air, not just that its motor is running.
Duct pressure: monitor duct pressure for ventilation control and alarms.
Water circuits: confirm flow across pumps, chillers and heat exchangers.

Produal PS: cost-effective mechanical switches for filter, fan and duct pressure monitoring, with field-selectable switching points.
Produal DPI-24: an electronic differential pressure switch for air that is also a multi-function transmitter and includes a flow switch, powered by 24 Vac/Vdc.
Beck 908: for water and heating circuits, adjustable from 40 to 1,000 mbar.

For industrial use and the full Beck range, see Differential Pressure Switches.

FAQ

How do I choose the setpoint for a filter alarm?

Use the filter manufacturer's recommended final pressure drop, or an agreed point between the clean and final pressure drop.

Switch or transmitter for filter monitoring?

A switch gives a simple alarm. A transmitter, or the DPI-24 which is both, shows the actual pressure drop so you can plan filter changes.

Can I use the same switch for air and water?

No. Use an air switch such as the Produal PS for ducts and filters, and the Beck 908 for water circuits.

Need help?

Our team helps you select the right differential pressure switches products for your application. Request a quote or discuss your requirements.

Tailored selection of differential pressure switches instruments

Instruments customized for your specific industrial setup

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