Dwyer Instruments 3304-OO3 Photohelic pressure switch gauge combines a pressure gauge with an integrated electrical switch, providing both a visual pressure reading and a switching output in one compact unit. Part of Dwyer's Photohelic line, the 3304-OO3 configuration enables monitoring pressure and automatically driving control circuits or alarms when the sensed pressure changes. This device is suited for industrial process and equipment monitoring where both indication and an automated response are required.
