Reduce Scrapping and Smelting, Promote Component Reuse > Unpowered, Hand Tools
> Diagnostic Tools
> DuPage County
> New
> Dwyer mercoid dpa-33-3-61 differential pressure switch
Dwyer mercoid dpa-33-3-61 differential pressure switch
Mercoid DPA-33-3-61 Differential Pressure Switch
The DP series differential pressure controls "make" or "break" one or more electrical circuits on changes in the difference between two pressures. Two opposed bellows operate mercury switches as the difference in pressure between them "widden" or "narrows". The operating points are adjustable from the outside by two knobs. Two pointers indicate the "on" and "off" operating points or the differnces in pressure between the two bellows at which the switch operation occurs. The circuit closes on an increase of pressure difference and opens the circuit on a decrease of pressure difference.
This is an old stock item that has never been used. Still in original box
Working pressure range: 30" hg vac. 50 psi
Adjustable operating range (Pressure diff.): 0-10 psi
