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Load Measuring Pins

SpecificationsPrinciplesApplicationsData SheetsManuals
 
Magtrol Load Measuring Pins are temperature-compensated transducers used to measure load and force and provide overload protection. The pins are mounted into machines in place of normal shafts and fitted with strain gauges, allowing them to produce a signal proportional to the measured load. Load Measuring Pins

Features

  • From 2.5 to 1250 kN (0.28 to 140 tons)
  • Admissible overload: 150% of the nominal load
  • Overload at rupture: 350% to 700% of nominal load (according to the model)
  • Temperature-compensated transducers with strain gauges in full-bridge configuration.
  • Pin made of high resistance stainless steel.
  • Insensitive to external mechanical and chemical effects (strain gauges inside the pin)
  • Ideal for use in hostile environments
  • Rugged and tight construction; maintenance-free
  • For new or refitted installations
  • ISO 9001 Certified
Receive a quotation for a load pin according to your application's dimensions by filling out our load pin inquiry form.
 
Additional features unique to each series include:
LB 230 Series  
  • Certified according to OIML R60 D0.1 from 50 to 200 kN for class IIII scales
  • Hermetically sealed execution for harsh environmental conditions (IP 67 protection class)
LE/LU 2xx, LE 3xx and LE 5xx Series,  
  • 2-wire (LE 2xx), 3-wire (LE 3xx) or 4-wire (LU) electronics for transmission over great distances
  • EMC execution for reliable trouble-free operation
  • Built-in test equipment (B.I.T.E.) included on LE 3xx and LE 5xx
  • Available with dual channels 5-wire (LE 5xx)
Safety
The high safety level of Magtrol Load Measuring Pins makes their use possible in the following diversified application fields:
  • Cranes and lifting devices
  • Machine industry
  • Marine, tankers, offshore oil platforms
  • Nuclear industry
  • Aviation
  • Chemical industry
At the customer's request, Magtrol can subject its load measuring pins to even more demanding tests such as:
  • Authenticity of the steel used
  • Impact tests by the EMPA (Swiss Federal Laboratory for Material Testing and Research)
  • Ultrasonic test
  • Magnetoscopic test
  • Test under reference load
 
Special Load Measuring Pins
Magtrol also manufactures special load measuring pins according to customer requirements. This shows our great flexibility for applications in extreme environments. Additionally, our computer calculation facilities allow us to respond quickly to any demand for special load measuring pins.
Customized Load Pin Special Load Pin Features
  • Customized Dimensions: diameter up to 250 mm/ length to 600 mm
  • High Load Capacity: up to 2500 kN)
  • Extended Operating Temperature: from -40°C to +200°C
  • High Pressure: up to 100 bar
 
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Specifications
For complete technical specifications and general dimension drawings, download the corresponding data sheet. For detailed dimension drawings… Calculators
Click on the underlined link in the table below. A PDF document will open in a new window.
Sales Drawings
Ratings apply to standard load pins only, special models are available by contacting Magtrol.
LB Series
Model(s) Nominal Load Nominal Diameter 3D Models (LB-210 SERIES)
kN tf mm PG Radial PG Axial
LB 210 2.5 0.28 24 N/A
LB 211 / LB 231 5 0.56 24 N/A
LB 212 / LB 232 10 1.12 24 N/A
LB 213 / LB 233 20 2.25 24 N/A
LB 214 / LB 234 50 5.62 35
LB 235 70 7.87 45 N/A N/A
LB 216 / LB 236 100 11.24 48
LB 217 / LB 237 200 22.48 65
LB 218 / LB 238 500 56.20 85
LB 220 / LB 240 1000 112.40 100
LB 221 / LB 241 1250 140.50 120

 

* Depending on model. See data sheet.
Series Ratings LB 210
Series
LB 230
Series
Mechanical Characteristics
Admissible overload 150% 150%
Overload at rupture 500% 500%
Electrical Characteristics
Bridge Impedance 350 ohms 700 ohms
Bridge Configuration single double
Output Signal 0.5 to 1.8 mV/V 0.5 to 1.8 mV/V
Accuracy (of FSD) 0.5% to 0.8%* < 0.4%
Power supply 5 to 12 V DC / AC 5 to 12 V DC / AC
Amplifier external external
Output Connection PG or
connector
Connector
only
Environmental Characteristics
Protection class IP 66 IP 67
Operating Temperature -25 °C to +80 °C
Storage Temperature -55 °C to +125 °C
View/Download
More Information
(printable PDF file)
Data Sheet Data Sheet
 
LE/LU 2xx, LE 3xx and LE 5xx Series
Model(s) Nominal Load Nominal Diameter
kN tf mm
LE/LU 211, LE 311, LE 511 5 0.56 24
LE/LU 212, LE 312, LE 512 10 1.12 24
LE/LU 213, LE 313, LE 513 20 2.25 24
LE/LU 214, LE 314, LE 514 50 5.62 35
LE/LU 216, LE 316, LE 516 100 11.24 48
LE/LU 217, LE 317, LE 517 200 22.48 65
LE/LU 218, LE 318, LE 518 500 56.20 85
LE/LU 220, LE 320, LE 520 1000 112.40 120
LE/LU 221, LE 321, LE 521 1250 140.50 120
* Depending on model. See data sheet.
Series Ratings LE 2xx
Series
LU 2xx
Series
LE 3xx
Series
LE 5xx
Series
Mechanical Characteristics
Admissible overload 150% 150% 150% 150%
Overload at rupture ≥500%* ≥500%* ≥500%* ≥500%*
Electrical Characteristics
Bridge Impedance 5000 ohms 350 ohms 350 ohms 2x 350 ohms
Bridge Configuration 2-wire 4-wire 3-wire 5-wire
Output Signal rated 4 to 20 mA 0 to 10 V rated 4 to 20 mA 2x rated 4 to 20 mA
Accuracy (of FSD) ± 0.1 % ± 0.1 % < 0.25%* < 0.25%*
Power supply 12 to 32 VDC 12 to 32 VDC 12 to 32 VDC 1 or 2x 12 to 32 VDC
Output Connection Axial, Souriau MS
3112 E 10-6P
Axial, Souriau MS
3112 E 10-6P
PVC Cable (Standard) or Axial, Souriau MS
3112 E 10-6P
PVC Cable (Standard) or Axial, Souriau MS
3112 E 10-6P
Environmental Characteristics
Protection class IP 66 IP 66 IP 66 IP 66
Operating Temperature -25 °C to +80 °C -25 °C to +80 °C -25 °C to +80 °C -25 °C to +80 °C
Storage Temperature -55 °C to +125 °C -55 °C to +125 °C -30 °C to +90 °C -30 °C to +90 °C
View/Download
More Information
(printable PDF file)
Data Sheet
 
 
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Operating Principles
When forces acting on mechanical constructions are to be measured, the additional equipment required can often be costly and difficult to install. The load measuring pin offers an excellent solution since it acts as a direct element in the assembly, replacing a non-instrumented pin or shaft. When employed as a measuring transducer, the load pin can be used as a replacement for existing pins in:
Fixed Points Pulleys Shackles
 Fixed balancing shakles
 
Measurement Principle
The load measuring pins operate on a shearing principle. We measure the deformation proportional to the load through a strain gauge bridge integrated in the pin. When force is applied to the load measuring pin along its sensitive axis , the effect on the strain gauge bridge results in an output signal proportional to the applied force. The powering of the strain gauge bridge, as well as the amplification of its output signal voltage, is performed either by an external amplifier (LB series) or through its internal amplifier (LE and LU series). Depending on the execution, the amplifier allows the monitoring of several levels.
Before load is applied After - the load is proportional to the signal
Strain guage load cell before load Strain guage load cell after load
 
Single Bridge vs. Double Bridge
Single Bridge Double Bridge
  • 4 Strain Gauges
  • Output Impedance: 350 Ohms
  • Used on: Simple and symmetrical mountings
  • Standard accuracy
  • 8 Strain Gauges
  • Output Impedance: 700 Ohms
  • Used on: Asymmetrical mountings
  • High accuracy
Load cell with 4 strain guages Load cell with 8 strain guages
4 strain     strain circle 8 strain     strain circle
 
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Magtrol, Inc (USA): 716-668-5555 • magtrol@magtrol.com ~ Magtrol SA (Switzerland): 41 (0)26 407 3000 • magtrol@magtrol.ch
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