Time Mark Model 261, Alternating Relay, Please Choose Number Of Poles, Voltage And Toggle Switch Options

Does it cost a little more ?  Yes.  Time Mark Alternators are still made in the USA, so they have a hard time competing with some other alternators that are not made in the USA.  5 year warranty, made in the USA, with US workers in a US plant.  Hard to beat.

The Model 261 series Alternating Relay is designed for duplex pumping systems where it is desirable to equalize pump run time. The solid-state alternating circuit drives an internal electromechanical relay. A continuous power source and control switch are required.
The control switch (float, pressure or other isolated contact) is connected between the L1 terminal and the control terminal. Each time the control switch is opened the output contacts will change states. Indicator lights on the case show the internal relay status.
On the optional toggle switch versions, the toggle switch is set to the ALTERNATE position. Setting the switch to Load 1 or Load 2 will lock the relay in position, preventing alternation.
Solid-state reliability
Socket mounted
Heavy-duty contact ratings
Optional Load 1/Load 2 toggle