Pros, Join Our TradeMaster Program!
The 2378-501 Amplifying Relay is a proportioning device designed for use in pneumatic control systems where the application requires the amplification of a proportional signal from a controlling device. The 2378-501 branch line pressure output increases as a 2:1 ratio to the input signal pressure (up to main air pressure) and amplifies the volume of air available to the final control device, thereby minimizing system lag.

The unit is factory adjusted for a 10 psig branch pressure at a signal pressure of 5 psig. A bias adjustment is provided which permits the effect of the input signal pressure to be decreased up to 9 psig from the actual input pressure
Read more
Manuals (1)
Max Ambient Temp (°F):
Proportional output at 2 to 1 ratio
Speak with a real person who will go out of their way to help!
Open Now:
Monday – Thursday
8am–7:45pm ET
8:30am–7:45pm ET

Product Reviews

Product Q&A

Add-on Item

This item is cost-prohibitive to ship on its own but is available to ship with orders over $200.

Why don't we show the price of this item?

We try to always offer you the lowest prices possible, but some manufacturers require that we only show these low prices once you take further action.

To see the price, simply add the item to your cart or sign in.