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MDI mercury contactors/relays are durable and float switches and liquid level controls for water and sewage Liquid Level Control Floats
Contactors and Solid State Relays,
Tilt, Tip-over and Proximity Switches
Motion and Shock Sensors.
MDI Mercury Displacement Industries Relays, Contactors, Liquid Level Control Floats, Tilt and Tipover switches
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Relay, Vertical, Liquid Level Control Floats, Tilt and Tipover switches
MDI Solid State Relays

For SS Series, click HERE


For SS Series, click HERE.
Click here to BUY!

Now at MDI Inc. we have a good selection of high quality Solid State Relays. We have 2 styles of 20 AMP, a 30 AMP, 2 styles of 50 AMP and a 70 AMP Solid State Relays.

For HPR Series, click HERE


We also now have a "Hockey Puck" design. These offer Direct copper bonding (DCB) technology, LED indication, Built-in varistor 480V and ratings up to 480 VAC and 75 AMPS.

For HPR Series, click HERE.
Click here to BUY!

For Liquid Level Control Floats, Contactors and Solid State Relays, Tilt, and Tipover contact MDI TODAY!

* P. O. Box 710 * 25028 U.S. 12 East * Edwardsburg, Michigan * 49112 *
* PH. (269) 663-8574 * FX. (269) 663-2924 *
* Toll Free US and Canada (800) 634-4077 *