Series PLS Paddle Level Switch

Weatherproof and Explosion Proof Option, Rotary Paddle Level Control, Top or Side Mounting for Dry Bulk Materials

Incorporated in the design of the PLS is a magnetic drive that is time proven by decades of use in our Mark Series valve position indicator product line. A 1 rpm synchronous motor rotates the paddle, utilizing a magnetic drive. As product builds up, the paddle is impeded from moving and the resulting motor torque activates the output switches and stops the motor. A spring mechanism reactivates the motor and returns the switches to normal state when the product no longer impedes the paddle rotation.

Standard construction is weatherproof with explosion-proof optional, and the unit can be side or top mounted. The PLS is designed with the industry standard 1-1/4" male NPT connection and mounting flanges.

Product Applications

  • Mining
  • Food and beverage
  • Silos
  • Hoppers

Models & Ordering

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Model Description Usually Ships Price Order
PLS-W-S-1-0-0-0-0
Ships: Next Day
Price: $245.00
Paddle level switch, SPDT, weatherproof, 120 VAC power supply. Next Day $245.00 Order
PLS-W-S-1-2-CSH-0-0
Ships: Next Day
Price: $300.25
Paddle level switch, SPDT, weatherproof, 120 VAC power supply, includes PDL-1 paddle and FLG-CSH flange. Next Day $300.25 Order
PLS-W-S-1-3-0-0-0
Ships: Next Day
Price: $274.75
Paddle level switch, SPDT, weatherproof, 120 VAC power supply, includes PDL-3 paddle. Next Day $274.75 Order

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Specifications

Service:
Dry powder or bulk materials compatible with wetted materials.
Sensitivity:
Minimum material density of 5 lb/ft³ (80 kg/m³), maximum of 200 lb/ft³ (3200 kg/m³).
Wetted Materials:
Paddles: 316 SS. Exposed Shaft: 316 SS. Shaft Seal: PTFE. Mounting Boss: Aluminum. Flexible Coupling: 316 SS. Mounting Flanges: Carbon Steel or 316 SS. Shaft Extension and Shaft Guards: Galvanized Steel or 316 SS.
Temperature Limits:
Standard Construction: Process: -40 to 300°F (-40 to 148.9°C), Ambient: -40 to 185°F (-40 to 85°C); High Temperature: Process: -40 to 500°F (-40 to 260°C), Ambient: -40 to 185°F (-40 to 85°C).
Pressure Limit:
30 psig (2.07 bar) maximum for .5 micron or larger material.
Power Requirement:
Select by part number: 110-120 VAC, 230 VAC, 24 VAC, 48 VAC, or 12 VDC.
Power Consumption:
Weatherproof models: 5 watts, Explosion-proof models: 3 watts.
Enclosure:
Aluminum, powder coated.
Enclosure Rating:
Weatherproof (W, WH construction): NEMA 4X, Explosion-proof (E, EH construction): NEMA 4X and rated for Class I, Div. 1 & 2, Groups C & D, Div. 1 & 2, Groups E, F, & G.
Switch Type:
SPDT or optional DPDT snap switch.
Electrical Rating:
15 A @ 120/230 VAC.
Electric Connections:
Screw terminals.
Conduit Connection:
3/4" female NPT.
Process Connection:
1-1/4" male NPT. Optional flange.
Indication Light:
Red LED that activates when switch is made or when switch is not made with RL option (not available on Explosion-proof models).
Time Delay Relay Option:
Five field adjustable ranges from 0-1 to 0-31 minutes. (RL option not available, DPDT option not available with 230 VAC time delay).
Weight:
Control head only: 4 lb (1.81 kg).
Agency Approvals:
cUL, UL approved as an auxiliary device or as an auxiliary device for hazardous locations.

Features

  • Magnetic drive that isolates and completely seals the control head from the process and environment preventing material or dust from entering the control head.
  • Motor shuts-off when paddle stalls increasing motor life, preventing motor burnout, and decreasing power usage.
  • Slip clutch design enabled by the magnetic drive that prevents damage to motor and drive mechanism from sudden or excessive loading on the paddle.
  • Status indication light on weatherproof models.
  • Screw cover on the enclosure for easy access with no worries about losing bolts or screws.
  • Modular design to allow field installation of any paddle, flanges, shaft extensions, or shaft guards.
  • Flexible coupling available for protection of the paddle and drive from side loads, surges or impacts. Recommended for top mount applications with shaft extension and applications with large or heavy materials.

Options

  • Contact the factory for pricing of shaft extensions, protective shields, and other options. More detailed information available in our Measurement & Control for Powder, Dust, and Bulk Materials Catalog.

Accessories

Model Number Description Usually Ships Price Order
PLS-EXT-GS-006 6" galvanized extension. 1-2 Weeks $22.55 Order
PLS-EXT-GS-012 12" galvanized extension. 1-2 Weeks $30.35 Order
PLS-EXT-GS-018 18" galvanized extension. 1-2 Weeks $38.15 Order
PLS-EXT-GS-024 24" galvanized extension. 1-2 Weeks $45.95 Order
PLS-EXT-GS-036 36" galvanized extension. 1-2 Weeks $61.55 Order
PLS-EXT-GS-048 48" galvanized extension. 1-2 Weeks $77.15 Order
PLS-EXT-SS-006 6" stainless extension. 1-2 Weeks $32.10 Order
PLS-EXT-SS-012 12" stainless extension. 1-2 Weeks $41.70 Order
PLS-EXT-SS-018 18" stainless extension. 1-2 Weeks $51.30 Order
PLS-EXT-SS-024 24" stainless extension. 1-2 Weeks $60.90 Order
PLS-EXT-SS-030 30" stainless extension. 1-2 Weeks $70.50 Order
PLS-EXT-SS-036 36" stainless extension. 1-2 Weeks $80.10 Order
PLS-EXT-SS-042 42" stainless extension. 1-2 Weeks $89.70 Order
PLS-EXT-SS-048 48" stainless extension. 1-2 Weeks $99.30 Order
Carbon steel mounting flange with full coupling. FLG-CSF Carbon steel mounting flange with full coupling. Next Day $29.75 Order
Carbon steel mounting flange with half coupling. FLG-CSH Carbon steel mounting flange with half coupling. Next Day $26.75 Order
316 SS mounting flange with full coupling. FLG-SSF 316 SS mounting flange with full coupling. Next Day $85.00 Order
316 SS mounting flange with half coupling. FLG-SSH 316 SS mounting flange with half coupling. Next Day $70.00 Order
Carbon steel paddle with half coupling.<br> Minimum bulk
density of 5 lb/ft³ (80 kg/m³). PDL-1 Carbon steel paddle with half coupling.
Minimum bulk density of 5 lb/ft³ (80 kg/m³).
Next Day $29.75 Order
Carbon steel paddle with full coupling.<br> Minimum bulk
density of 30 lb/ft³ (481kg/m³). PDL-2 Carbon steel paddle with full coupling.
Minimum bulk density of 30 lb/ft³ (481kg/m³).
Next Day $28.50 Order
316 SS paddle with half coupling.<br>
Minimum bulk
density of 30 lb/ft³ (481
kg/m³). Fits through a 1-
1/4 PDL-3 316 SS paddle with half coupling.
Minimum bulk density of 30 lb/ft³ (481 kg/m³). Fits through a 1- 1/4" coupling eliminating the need for a mounting flange.
Next Day $29.75 Order
316 SS paddle with full coupling.<br>
Minimum bulk
density of 70 lb/ft³ (1122
kg/m³). Fits through 1-1/4 PDL-4 316 SS paddle with full coupling.
Minimum bulk density of 70 lb/ft³ (1122 kg/m³). Fits through 1-1/4" coupling eliminating the need for a mounting flange.
Next Day $28.50 Order

Videos

Model Chart

 
EXAMPLE PLS W S 1 1 CSF GS GS 012 FC Series PLS-W-S-1-1-CSF-GS-GS-012-FC Paddle Level Switch, weatherproof enclosure, SPDT, 110-120 VAC, low density paddle, carbon steel with full coupling, 12" 1/4 NPS galvanized steel shaft extension and protective shield, with flexible coupling.
SERIES PLS                   Paddle Level Switch
ENCLOSURE
DESIGN
  W
E
WH
EH
                Weatherproof
Explosion-proof
Weatherproof High Temperature
Explosion-proof High Temperature
SWITCH TYPE     S
D
TD1
TD2
              SPDT
DPDT (dual SPDT switches)
DPDT Time Delay, 120 VAC
SPDT Time Delay, 230 VAC
POWER SUPPLY       1
2
3
4
5
6
7
            110-120 VAC
230 VAC
24 VAC
48 VAC
12 VDC
24 VDC
230 VAC with CE approval (Not valid with E, EH, TD1, TD2)
PADDLE         0
1
2
3
4
          No Paddle
Low Density Paddle (PDL-1)
Medium Density Paddle (PDL-2)
Banana Paddle (PDL-3)
High Density Paddle (PDL-4)
FLANGE           0
CSH
CSF
SSH
SSF
        No Mounting Flange
Carbon Steel with Half Coupling (FLG-CSH)
Carbon Steel with Full Coupling (FLG-CSF)
316SS with Half Coupling (FLG-SSH)
316SS with Full Coupling (FLG-SSF)
SHAFT EXTENSION
MATERIAL
            0
GS
SS
      None
1/4 NPS Galvanized Steel
1/4 NPS 316SS
PROTECTIVE
SHIELD
MATERIAL
              0
GS
SS
    None
1/4 NPS Galvanized Steel
1/4 NPS 316SS
SHAFT EXTENSION
AND SHIELD
LENGTH
                 
006
012
018
024
030
036
042
048
  None
6 Inch
12 Inch
18 Inch
24 Inch
30 Inch
36 Inch
42 Inch
48 Inch
OPTIONS                   FC
NL
RL
SS
Flexible Coupling (CPL-FLX)
No Indicator Lights
Reversed Light - Light Indication when Paddle Freely Rotates
316SS Housing, Cover, Mounting Boss

Product Literature

Manuals

Catalog Pages

Approvals

Drawings

Questions

Question
What are the two dry product level switch model types? What ranges do they cover? How are they adjusted? How many set-points do they have?
Answer
GSD3DA - gravity (elastomer) suspension, aluminum housing, polyurethane diaphragm, standard 15 amp switch. PSD16A - pneumatic (fabric), suspension, aluminum housing, filter fabric diaphragm, polyester 150 micron permeability, standard 15 amp switch. They can be adjusted to any level. They are adjusted by a screw adjustment. One setpoint available. For additional options, you could look at our CLS2 Series Capacitive Level Switch, TFLS Series Tuning Fork Level Switch, PLS and PLS2 Series Paddle Level Switches.
Question
What is the key feature of both Proximity position indicators and level switches that sets these products apart from all competitors?
Answer
Magnetic coupling.

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