Morrison Bros Adjustable Level Sensor with Alarm

Morrison Bros Adjustable Level Sensor with Alarm




This adjustable float activated simple switch device with alarm is used to monitor liquid level at a desired set point.


  • Level sensor in liquid storage tanks
  • Activates audible alarm


Standard Features

Alarm Box

  • Audible and visual indicators
  • Self-powered by long-life replaceable lithium batteries
  • Low battery visual indicator
  • Audible alarm sounds 90 dB alarm at four feet away
  • Corrosion-resistant and water-resistant housing for long life
  • In compliance with UL 913 and CSA 157 intrinsic safety standards for Class I, Division 1 and 2, Group D hazardous location 



  •  Four sensor length ranges
  • Fully adjustable within the sensor range length
  • Installs into a 2” female threaded opening
  • Normally open switch easily converted to normally closed operation


Construction Details

  •  Alarm box - polycarbonate plastic
  • Wires - Teflon® jacketed wires
  • Floats - 316 stainless steel
  • Tube - brass (924); 304 stainless steel (924S)
  • Bushing - e-coated steel (924); 304 stainless steel (924S)


Electrical - Level Sensor

  • 100 watt resistive load, 300VAC - 700mA max / 350VDC - 1.0A max, SPST



  • Florida DEP EQ-527 (918S), Florida DEP EQ-862 (924/924S)

Note: Alarm & Sensor are packaged separately.