Series PLS2 Paddle Level Switch

Brand: Dwyer Instruments, LLC

The Series PLS2 Paddle Level Switches is an electromechanical level switch designed for level monitoring of bulk materials.

The rotating measuring vane is driven by a brushless synchronous motor at one revolution per minute and as product builds up, the paddle rotation is impeded and the resulting motor torque activates the output switch and stops the motor.

The PLS2 is designed with the industry standard 1-1/4˝ male NPT connection and unit can be side or top mounted.
  • Torque adjusting mechanism eliminates the need for different sized paddles
  • 3 sensitivity settings for spring force can be set for light to very sticky materials
  • Brushless synchronous motor assures long term reliability and efficiency
  • Motor shuts ceases operation when paddle stalls
  • Screw cove for easy access with no worries about losing bolts or screws
  • Top or side mountable for added installation flexibility
  • Unaffected by the dielectric constant of the sensed material, making it superior to a capacitance level switch for applications where the dielectric constant is too low, where there is more than one material being used in one vessel, and when material moisture content can change


Ambient Temperature Range

  • -20° to 60° C (-4° to 140° F)

Approvals & Certifications

  • CE
  • FM

Conduit Connection

  • 3/4” NPT Female


  • 2.5 W
  • 4 VA

Electrical Connectors

  • Screw Terminal

Electrical Rating

  • 3 A at 30 Vdc
  • 5 A at 250 Vac

Enclosure Finish

  • Powder-Coated

Enclosure, Body Material

  • Aluminum

Environmental Protection

  • Class II, Div. 1, Groups E, F, G
  • Class III, Div. 1, Hazardous Location
  • Explosion-proof
  • IP66
  • NEMA 4


  • Dry Powder or Bulk Materials


  • Side Mounting
  • Top Mounting

NPT Connection

  • 1-1/4” NPT Male
  • 3/4” NPT Female

Power Requirement

  • 115 Vac
  • 230 Vac
  • 24 Vdc

Process Connection Material

  • Aluminum

Process Temperature

  • -25° to 80° C (-13° to 176° F)


  • 96 kg/m³ (6 lbs/ft³) Min. Material Density

Shaft Material

  • 303 Stainless Steel

Shaft Seal Material

  • NBR

Supply Pressure

  • psi: 11.6 (kPa: 80, bar: 0.8)

Switch Type

  • SPDT Micro Switch

Wetted Materials

  • 304 Stainless Steel

  • Mining
  • Food and Beverage
  • Silos
  • Hoppers
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