Dwyer Pressure Switches

Dwyer pressure switches are designed for dependable operation in a variety of HVAC, process, and industrial applications. These simple yet robust devices sense pressure changes and trigger electrical signals when the change exceeds a preset threshold.

Using pressure switches for airflow proving in duct systems and for monitoring the static pressure of the duct system (including the pressure drop across filters) is a common application. Also, we frequently use them to control the activation of fans and blowers in various parts of an HVAC system. These pressure switches have been used successfully in reverse airflow applications (using them to assure that airflow is in the correct direction). On occasion, we have found this pressure switch to be useful for monitoring the pressure of water and other light liquids.

The pressure switches can be mounted in a variety of locations and have been used effectively in a variety of orientations. In many applications, we have found it beneficial to use the pressure switch as part of a safety circuit--monitoring the pressure on the upstream side of a pump or a blower to assure that the system will shut down before the fan or pump can fail.

Dwyer pressure switches have a strong reputation for being valuable instruments that provide a cost-effective solution for not only keeping an eye on pressure but also for using that information to make judgments about what a system should do in response to a pressure change.