Sensor Float Mini Control Switch 30MPCNO

Manufacturer Part

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Sensor Float® Mini Mercury-Activated, Narrow-Angle Control Switch

The Sensor Float® Mini control switch is used to accurately monitor high (normally open) or low (normally closed) liquid levels to activate pump control panels and alarms in confined sewage and non-potable water applications.

Normally Open Models (high level): The control switch turns on (closes) when the float tips slightly above horizontal signaling a high level and turns off (opens) when the float drops slightly below horizontal.

Normally Closed Models (low levels): The control switch turns on (closes) when the float tips slightly below horizontal signaling a low level and turns off (opens) when the float tips slightly above horizontal.

This switch is not sensitive to rotation. Contact SJE Rhombus regarding intrinsically safe applications.


  • Designed for use in confined spaces
  • Control differential of .5 inches (1 cm) above or below horizontal
  • For normally open (high level) or normally closed (low level) applications
  • In standard cable lengths of 10, 15, 20, or 30 feet (3, 5, 6, or 10 meters) – longer lengths available
  • Two mounting options for flexibility in installation:
    • Mounting Clamp: for applications where the float can be attached to a discharge pipe or similar mounting device
    • Externally Weighted: for applications where the float can be suspended from above
UL Listed, CSA Certified
Five-Year Limited Warranty


  • Flexible 18 gauge, 2 conductor (UL, CSA) SJOW, water-resistant (CPE) jacket
  • 2.81 inches diameter x 3.42 inches long (7.14 x 8.68 cm) high impact, corrosion resistance, PVC housing for use in sewage and non-potable water up to 140°F (60°C)
  • 30 feet (9 meters), 13 PSI (90 kPa)
  • Single pole, single throw, mercury-to-metal contacts, hermetically sealed in a steel capsule and epoxy sealed in the float housing
  • 5 amps, 120/230 VAC, 50/60 Hz

NOTE: This switch is not recommended for controlling electrical loads less than 30 milliamps, 12 VAC and non-arcing electrical loads (intrinsically safe applications).

Technical Drawings
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Key Specs
Length 5.42"
Width 4.81"
Height 5"
Manufacturer SJE-Rhombus
Manufacturer Part Number 1002199
Disclaimers This product contains Mercury and cannot be shipped to CA, CT, IL, LA, ME, MD, MN, NH, NY, RI, WI, VT or anywhere in Canada.
Shipping Height 4.81"
Shipping Length 5.42"
Shipping Weight 4.68lbs
Shipping Width 4.81"
Ship Class UPS