McDonnell & Miller RB-122-E – Low Water Cut-Off

McDonnell & Miller General-Purpose, Liquid Flow Switches. The McDonnell & Miller Series FS250 – FS251 (NEMA1 version), and FS254 (NEMA4 version). These flow switches incorporate key changes to address customer expressed needs of greater reliability and lower flow sensing capabilities in a general purpose flow switch.

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SKU: MCDM009 Category: Tag:


McDonnell & Miller RB-122-E – Low Water Cut-Off

Features and Benefits

For residential applications
Electronic operation
Easy to install and wire
Red low water indicating LED
Green power indicating LED
Now with test button
Automatic reset
No blow down required
20,000 ohms probe sensitivity
Maximum ambient temperature 120°F (49°C)
Maximum water temperature 250°F (121°C)
Maximum water pressure 160 psi (11.2 kg/cm2)


    • Over 50 years of industry knowledge
    • Fast customer service; response within 15 minutes
    • Best price quality ratio
    • We facilitate the total procurement, purchase and engineering process of our customers