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PLS2 Paddle Level Switch




   The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential
customers and current employees as a resource only. They may not be reproduced, published, or
transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness,
 product names, and logos, included within these compilations may not be used without specific,
             written prior permission from Dwyer Instruments, Inc.
                              ©Copyright 2011 Dwyer Instruments, Inc.
Theory of Operation
• The paddle is installed through the wall of a
  vessel so that it comes in contact with the
  bulk media
• An electric motor in the control spins the
  paddle. As the media builds up the paddle is
  impeded from spinning
• When the paddle stops spinning the motor
  then rotates activating the output switch
Theory of Operation

• The motor then turns off
• When the material no longer impedes the
  paddle a spring mechanism reactivates the
  motor, and returns the switches to the normal
  position
• The paddle then starts spinning again
Specifications
• Temperature Limits:
     Process: -25 °C to 80°C
    Ambient: -4°C to 60°C
• Pressure Limit: 0.7 BAR
• Power Options: 120vac, 230vac or 24vdc
• Electrical Rating: 5amp @ 250vac
                     3amp @ 24vdc
• Adjustable Paddle Sensitivity
• 1-1/4” NPT Process Connection
• PLS2 comes with a paddle
• CE and FM approved
Paddle Sensitivity Adjustment
Mounting
Accessories
Paddles
• PLS2-PL1 - Double Sided Spring Paddle
• PLS2-PL2 - Single Sided Spring Paddle
Extensions
• PLS2-EX1 - 8.5˝ Shaft Extension
• PLS2-EX2 - 19.6˝ Shaft Extension
• PLS2-EX3 - 39.4˝ Shaft Extension
• PLS2-EX4 - 78.7˝ Shaft Extension
Mounting Flanges
• FLG-CSH – Half Coupling Mounting Flange
• FLG-CSF – Full Coupling Mounting Flange
Application Products
•  Rocks          •   Silica Sand    •   Animal Feed
•  Calcium Dust   •   Foundry Sand   •   Pellets
•  Regrind        •   Wood Chips     •   Rubber
•  Malt           •   Metal Chips    •   Coal
•  Limestone      •   Peanuts        •   Clays
                                     •   Grain
•  Pre-Mix        •   Resin
  Ingredients                        •   Rawhide
                  •   Sawdust
                                     •   Fertilizer
• Granulates      •   Soil
                                     •   Cement
Applications
Plastic processing
Applications

Textile
Machine
Applications
PVC Powder
Mixer
Applications

Cement Silo
Applications

Grain Hopper
Pneumatic Conveying
• Powder or bulk materials are transported
  through the system by pressure. The
  material flows from the storage silo to the
  receiving bins. The PLS indicates level at
  each station.
Conveying

• Here the PLS is
  controlling the inlet
  or outlet conveying
  system to keep the
  silo filled.
Questions


To order a free catalog or for more information contact;
       Dwyer Instruments, Inc., P.O. Box 373,
               Michigan City, IN., 46361
     Telephone: (800) 872-9141 or (219) 879-8000
                  Fax: (219) 872-9057
        Internet address: www.dwyer-inst.com
             E-mail: info@dwyer-inst.com

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Series PLS2 Paddle Level Switch

  • 1. PLS2 Paddle Level Switch The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used without specific, written prior permission from Dwyer Instruments, Inc. ©Copyright 2011 Dwyer Instruments, Inc.
  • 2. Theory of Operation • The paddle is installed through the wall of a vessel so that it comes in contact with the bulk media • An electric motor in the control spins the paddle. As the media builds up the paddle is impeded from spinning • When the paddle stops spinning the motor then rotates activating the output switch
  • 3. Theory of Operation • The motor then turns off • When the material no longer impedes the paddle a spring mechanism reactivates the motor, and returns the switches to the normal position • The paddle then starts spinning again
  • 4. Specifications • Temperature Limits: Process: -25 °C to 80°C Ambient: -4°C to 60°C • Pressure Limit: 0.7 BAR • Power Options: 120vac, 230vac or 24vdc • Electrical Rating: 5amp @ 250vac 3amp @ 24vdc • Adjustable Paddle Sensitivity • 1-1/4” NPT Process Connection • PLS2 comes with a paddle • CE and FM approved
  • 7. Accessories Paddles • PLS2-PL1 - Double Sided Spring Paddle • PLS2-PL2 - Single Sided Spring Paddle Extensions • PLS2-EX1 - 8.5˝ Shaft Extension • PLS2-EX2 - 19.6˝ Shaft Extension • PLS2-EX3 - 39.4˝ Shaft Extension • PLS2-EX4 - 78.7˝ Shaft Extension Mounting Flanges • FLG-CSH – Half Coupling Mounting Flange • FLG-CSF – Full Coupling Mounting Flange
  • 8. Application Products • Rocks • Silica Sand • Animal Feed • Calcium Dust • Foundry Sand • Pellets • Regrind • Wood Chips • Rubber • Malt • Metal Chips • Coal • Limestone • Peanuts • Clays • Grain • Pre-Mix • Resin Ingredients • Rawhide • Sawdust • Fertilizer • Granulates • Soil • Cement
  • 14. Pneumatic Conveying • Powder or bulk materials are transported through the system by pressure. The material flows from the storage silo to the receiving bins. The PLS indicates level at each station.
  • 15. Conveying • Here the PLS is controlling the inlet or outlet conveying system to keep the silo filled.
  • 16. Questions To order a free catalog or for more information contact; Dwyer Instruments, Inc., P.O. Box 373, Michigan City, IN., 46361 Telephone: (800) 872-9141 or (219) 879-8000 Fax: (219) 872-9057 Internet address: www.dwyer-inst.com E-mail: info@dwyer-inst.com