A normally open type manual reset switch such as Dwyer®Instruments, Inc. Part No. A-601 is connected to the terminals in Sections B and C. The circuit must be “armed by momentarily

Series DH3 Digihelic® Differential Pressure Controller 3 in 1 Instrument: Gage, Switch and Transmitter, Square Root Output for Flow. The Series DH3 Digihelic® Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output all packed in the popular Photohelic® gage style housing.

Setpoints from 10" w.c. to 200 psid – Rated 1500 psig, Weatherproof. Explosion-proof Series H3 Explosion-Proof Differential Pressure Switch, heavy duty, industrial unit has a unique new

Our most popular Series 1900 Compact Low Differential Pressure Switch combines advanced design and precision construction to make these switches able to perform many of the tasks

The compact size, adjustment knob and low cost make the Dwyer ADPS switch the perfect choice for HVAC applications. For a metal clad, more industrial design 

Dwyer Differential Pressure Switch with Optional Installer Kit. Designed for pressure, vacuum and differential pressures. Compact Size and Ajustable Knob.

Pressure ranges from 0.07 in w.c. to 85 in w.c. make this switch suitable for a wide range of applications Options Weatherproof Housing - 16-ga. steel enclosure with gasketed cover (NEMA 4, IP66) for wet or oily conditions. Withstands 200 hour salt spray test. Wt. 5-1/2 lbs. (2.5 kg). Switch must be factory installed.

Dwyer’s wide selection extends to Gages, Transmitters, Switches, Data Loggers, and Monitors for Differential Pressure. Applications vary between the different types of differential pressure

The Dwyer Model 1900-5-MR manual reset pressure switch is designed to monitor duct static and shut down the blower when excess pressure occurs. The switch must be manually reset before the system can start again. Switch contacts are SPDT with solder-type connections. The Model 1900-5-MR measures static pressure only, not differential pressure.

A normally open type manual reset switch such as Dwyer®Instruments, Inc. Part No. A-601 is connected to the terminals in Sections B and C. The circuit must be "armed by momentarily closing the switch while the black pointer is to the right of the set point.

Set point adjustment on the switch is easily accessible for modifying the set point. A mounting bracket is included for simplified installation. MANUAL RESET