MODEL BL-50

Rotary Paddle Bin Level Indicator

Our industry standard workhorse level detection sensor for powders and bulk solids – high reliability, low maintenance, and high value.

These rugged and reliable rotary paddle bin level indicators are the most universal sensor for detecting the presence and absence of bulk solids ranging in density from 5 to over 100 pounds per cubic foot (80 to 1600 kilograms per cubic meter). Model BL-50 units are equipped with fail-safe relay output, high intensity LED’s, industry-standard 1-1/4″ process connection, two conduit entrances, and food grade materials of construction. All units are available with folding or fixed paddles for easy installation from outside the bin and can be top or side mounted.

  • SUPER BRIGHT LED’s locally indicate Normal / Alarm status

  • Rugged aluminum enclosure with powder coat finish (FDA Compliant)

  • Improved moisture seal with a bolt-on cap

  • Selectable High/Low fail-safe output on power failure

  • Three bearing shaft assembly increases reliability and life

  • Internal bi-directional torque limiter protects motor

  • Automatic motor shut-off

  • DPDT relay output

  • Removable wiring terminals

  • Interchangeable with other brands accessories

  • Adjustable sensitivity (if needed)

  • Dual conduit entrances

MODEL BL-50

Rotary Paddle Bin Level Indicator

Our industry standard workhorse level detection sensor for powders and bulk solids – high reliability, low maintenance, and high value.

These rugged and reliable rotary paddle bin level indicators are the most universal sensor for detecting the presence and absence of bulk solids ranging in density from 5 to over 100 pounds per cubic foot (80 to 1600 kilograms per cubic meter). Model BL-50 units are equipped with fail-safe relay output, high intensity LED’s, industry-standard 1-1/4″ process connection, two conduit entrances, and food grade materials of construction. All units are available with folding or fixed paddles for easy installation from outside the bin and can be top or side mounted.

  • SUPER BRIGHT LED’s locally indicate Normal / Alarm status

  • Rugged aluminum enclosure with powder coat finish (FDA Compliant)

  • Improved moisture seal with a bolt-on cap

  • Selectable High/Low fail-safe output on power failure

  • Three bearing shaft assembly increases reliability and life

  • Internal bi-directional clutch protects motor

  • Various voltages

  • Automatic motor shut-off

  • DPDT relay output

  • Removable wiring terminals

  • Interchangeable with other brands accessories

  • Adjustable sensitivity (if needed)

  • Dual conduit entrances

Principal of Operation

For several decades rotary paddle technology has been used as a method for detecting the presence and absence of bulk solid materials. A robust synchronous motor drives a stainless-steel output shaft at approximately 2 RPM. The paddle is attached to the shaft and rotates freely in the absence of material within the bin.

Material presence surrounding the paddle in the bin will impede its rotation and cause the state of the built-in relay contacts to change, indicating material presence. The builtin LED’s will change to indicate the status of the alarm condition.

Application and Use

High (full), low (empty), intermediate (demand) level indication, and plugged chute detection, are common applications within a wide variety of industries.

Prevention of bin overfilling and material outage conditions are typical uses of these devices. The Model BL-50 rotary paddle bin level indicators can be used to detect materials with density from 5lbs/ft³ (80kg/m³) for low and intermediate level control applications and from 10lbs/ft³ (160kg/m³) for high level indication.

Example materials include plastic pellet, food stuffs, feed and their ingredients, grains, cement, aggregate materials,
nuts, flour, resins, sand, coal, chemicals, limestone, wood, sawdust and many more.

Technical Data

Housing Die-cast aluminum, FDA compliant powder coat, NEMA Type 4X, IP65
Process Temp Up to 300° F (149° C)
Ambient Temp -40° F to +158° F
(-40° C to +70° C)
Sensitivity Low Level ≥ 5lbs/ft³,
High Level ≥ 10lbs/ft³,
Adjustable setting
Motor Voltage 115VAC
Output DPDT Relay, 8A @ 250VAC
Process Connection 1-1/4″ NPT powder coated
Bearings Three (3) sealed bearings
Certifications CE mark, SGS Mark
UL61010-1, CSA C22.2

More Information

Click here to download product line PDF’s

Model BL-50 Sales Flyer
Model BL-50 Technical Information
Model BL-50 Installation, Operation and Maintenance Instructions
Model BL-50 Accessories Technical Information

Model BL-50 Rotary Paddle Accessories

  • Insertable folding 1- and 2-vane paddles
  • Std. 5” Dia. & Large 7” Dia. threaded tri-vane paddles
  • Insertable threaded Banana and 1-vane heavy duty paddles
  • 2 and 4-vane heavy duty threaded paddles
  • Extension shafts and shaft guards
  • Mounting plate kits

Principal of Operation

For several decades rotary paddle technology has been used as a method for detecting the presence and absence of bulk solid materials. A robust synchronous motor drives a stainless-steel output shaft at approximately 2 RPM. The paddle is attached to the shaft and rotates freely in the absence of material within the
bin.

Material presence surrounding the paddle in the bin will impede its rotation and cause the state of the built-in relay
contacts to change, indicating material presence. The builtin LED’s will change to indicate the status of the alarm condition.

Application and Use

High (full), low (empty), intermediate (demand) level indication, and plugged chute detection, are common applications within a wide variety of industries.

Prevention of bin overfilling and material outage conditions are typical uses of these devices. The Model BL-50 rotary paddle bin level indicators can be used to detect materials with density from 5lbs/ft³ (80kg/m³) for low and intermediate level control applications and from 10lbs/ft³ (160kg/m³) for high level indication.

Example materials include plastic pellet, food stuffs, feed and their ingredients, grains, cement, aggregate materials,
nuts, flour, resins, sand, coal, chemicals, limestone, wood, sawdust and many more.

Technical Data

Housing Die-cast aluminum, FDA compliant powder coat, NEMA Type 4X, IP65
Process Temp Up to 300° F (149° C)
Ambient Temp -40° F to +158° F
(-40° C to +70° C)
Sensitivity Low Level ≥ 5lbs/ft³,
High Level ≥ 10lbs/ft³,
Adjustable setting
Motor Voltage 115VAC
Output DPDT Relay, 8A @ 250VAC
Process Connection 1-1/4″ NPT powder coated
Bearings Three (3) sealed bearings
Certifications CE mark, SGS Mark
UL61010-1, CSA C22.2

More Information

Click here to download product line PDF’s

Model BL-50 Sales Flyer
Model BL-50 Technical Information
Model BL-50 Installation, Operation and Maintenance Instructions
Model BL-50 Accessories Technical Information

Model BL-50 Rotary Paddle Accessories

  • Insertable folding 1- and 2-vane paddles
  • Std. 5” Dia. & Large 7” Dia. threaded tri-vane paddles
  • Insertable threaded Banana and 1-vane heavy duty paddles
  • 2 and 4-vane heavy duty threaded paddles
  • Extension shafts and shaft guards
  • Mounting plate kits

Ordering Information

Sensor Final Assembly Part Number Structure

Ordering Information

Sensor Final Assembly Part Number Structure

Power Supply

1 – 115VAC

Approvals

1- Ordinary Location

Shaft Coupling

1- None
2- Standard Coupling
3- Optional Coupling

Process Connection

1- 1-1/4″ NPT aluminum

Temperature

1- Standard

Power Supply

1 – 115VAC

Approvals

1- Ordinary Location

Shaft Coupling

1- None
2- Standard Coupling
3- Optional Coupling

Process Connection

1- 1-1/4″ NPT aluminum

Temperature

1- Standard

Get a Quote or Call Now to Order! 330-523-5215

Get a Quote or Call Now to Order!
330-523-5215