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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
Our Relay Switch Quote Form


* Relay Information * Relay Pics and Drawings *
* Mercury Spill Kit * Go Back *


If you already have your part number and you do not need the below form use our Quick Quote Form.


Please select either order or quote:   Req.
Your name or business:    Req.
E-Mail address:    Req.
Location:    Req.
             City and State or Country
Phone number:    Req.


-Build a Relay Catalog Number-

Numbering system sample: 2 35 NO  -  120A H T -18
  A B   C D    E F  Std


A - Number of Poles

1 Pole - 30, 35, 60 and 100 AMP
2 Pole - 30, 35, 60 and 100 AMP
3 Pole - 30, 35, 60 and 100 AMP
4 Pole - 35, 60 and 100 AMP
Please select number of poles here:    Req.

B - Ampere of Relay

30 - 30 AMP pole (Can NOT be a T-Top)
35 - 35 AMP pole
60 - 60 AMP pole (Can NOT be a T-Top)
100 - 100 AMP pole (Can NOT be a T-Top)
Please select Relay Ampere here:    Req.

C - Switch operation

NO - Normally Open operation
NC - Normally Closed operation
Please select Operation Type here:    Req.

D - Coil Voltage

12D - 12 VDC
24A - 24 VAC 50/60 Hz
24D - 24 VDC
48D - 48 VDC
120A - 120 VAC 50/60 Hz
125D - 125 VDC
220A - 208 - 240 VAC 50/60 Hz
250D - 250 VDC
277A - 277 VAC 50/60 Hz
480A - 480 VAC 50/60 Hz
Select :    Req.

E - H is for other then AC resistive loads (Optional)

Select if used for other then AC resistive loads.
Please select option here:

F - Top Termination (Optional)

Only for 35 AMP Relay
Please select option here:

-18 - Steel Strap

Use with 2, 3 or 4 pole 35 and 60 AMP units, can be used with single pole relays.
100 AMP units are steel strap only.
We recommend to use the Steel Strap
Please select if you want the Steel Strap:    Req.

Please select how many you would like    Req.

More Relay options available, please email us to get more information.

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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 *