Often used with ovens, dryers, and HVAC systems, these switches detect small differences in air pressure to indicate a filter is clogged or help you maintain a certain air pressure. When the differential pressure reaches your setpoint, these switches can turn equipment on and off, activate automated controls, or signal alarms. They are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on or from on to off. All meet at least one safety standard.

When measuring pressure in ductwork, pair them with a static pressure probe.

Troubleshoot and monitor the difference in air pressure between two points—these switches have a dial indicator to show differential pressure in real time. The dial indicator operates independently, so you can read it even if the power is off. These switches are often used with ovens, dryers, and HVAC systems to indicate a filter is clogged or help you maintain a certain pressure. They activate at two set pressures, so you can trigger different processes, such as turning on a fan when pressure is too low or opening an exhaust vent if it’s too high. They are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on or from on to off. All are CE marked, so they meet European safety standards.

When measuring pressure in ductwork, pair them with a static pressure probe.

To check the difference in pressure between two points, these switches have a dial indicator that shows differential pressure in real time. The dial indicator operates independently of the switch. You’ll sometimes see these switches used to indicate a filter is clogged in a pump or cooling system. When the differential pressure reaches your setpoint, they turn equipment on and off, activate automated controls, or signal alarms. They are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on or from on to off.

Rated NEMA 4X, these switches protect against dirt, washdown, and corrosion. They are also rated IP65 for protection from dust and rinsing. All are CSA certified, so they meet Canadian safety standards.

With an explosion-proof enclosure that meets NEMA 7 and 9 standards for hazardous locations, these switches were tested and verified by UL for use where explosive gas or dust may be present. Often used with ovens, dryers, and HVAC systems, they can indicate a filter is clogged or help maintain a certain air pressure. These switches turn equipment on and off, activate automated controls, or signal alarms when the differential pressure reaches your setpoint. They are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on or from on to off.

In addition to being UL listed, these switches are CE marked and FM approved, so they also meet European safety standards. They also are IP and NEMA rated for use outdoors and protect against dust and splashing water.

When measuring pressure in ductwork, pair them with a static pressure probe.

Tested and verified by UL and C-UL for use where explosive dust or gas are present, these switches have an explosion-proof enclosure that meets NEMA 7 and 9 standards for hazardous locations. They are often used to indicate a filter is clogged in a pump or cooling system. When the differential pressure reaches your setpoint, these switches can turn equipment on and off, activate automated controls, or signal alarms. They are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on or from on to off.

In addition to being UL and C-UL listed, these switches are CE marked, so they also meet European safety standards. All switches are IP and NEMA rated for use outdoors and to protect against some corrosion, dust, and washdowns.

Often used to detect clogged air filters and iced air conditioner coils, these switches sense small changes in pressure between two points in your duct.

Use this switch to sense changes in airflow velocity in duct. The paddle extends into the duct and actuates the switch when airflow reaches the setpoint. Switch is rated NEMA 3R for protection from dirt, falling liquids, and light splashing.