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Load Cells available for purchase in our new webstore
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Load Cells

20 kG - 44 lbf

50 kG - 110 lbf

100 kG - 220 lbf

200 kG - 440 lbf

350 kG - 770 lbf

500 kG - 1,100 lbf

1,136 kG - 2,500 lbf

1,818 kG- 4,000 lbf

 

For Test Stands Complete 
with Load Cells, go here


 
 
Sweet Little Load Cells:  20, 50, and 100 kG

601 load cell

Single Point Cantilever Style

601_schematic

Dimensions in MM

Thread size: M6

601 pinout
 Rated Load(kg) 20, 50, 100
 Precision  C2 C3 Insulation Resistance(MΩ)   ≥5000(100VDC)
 Comprehensive Error(%F.S)  0.03 0.02 Excitation Voltage(V)   9~12(DC) 
 Rated output(mv/v)   2 ± 0.1 Compensated temp.Range (℃ )   -10~+40
 Non-linearity(%F.S)    0.03 0.017 Use Temp. Range (℃ ) -35~+65
 Hysteresis(%F.S)  0.03 0.02 Temp.Effect on Zero (%F.S/10℃)   0.03 0.017
 Repeatability(%F.S)  0.02 0.01 Temp.Effect on Span (%F.S/10℃)   0.02 0.014
 Creep (%F.S/30min)   0.02 Safe Overload (%F.S)   120
 Zero Balance (%F.S)     ±1 Ultimate Overload (%F.S)   150
 Input Resistance (Ω)    405±6 Defend Grade IP65
 Output Resistance (Ω )  350±3 Cable Length 0.42m

 

20, 50, and 100 kG

Go here for pricing and online purchasing

 


Beefier Load Cells:  200, 350 kG

638

Single Point Cantilever Style

638 schematic

Dimensions in MM

Thread size: M6

638 pinout
 Rated Load(kg) 200, 350 kG
 Precision C2 C3 Insulation Resistance(MΩ)   ≥5000(100VDC)
 Comprehensive Error(%F.S)  0.03 0.02 Excitation Voltage(V)   9~12(DC) 
 Rated output(mv/v)    2 ± 0.01 Compensated temp.Range(℃ )   -10~+40
 Non-linearity(%F.S)   0.03 0.017 Use Temp. Range(℃ ) -35~+65
 Hysteresis(%F.S)  0.03 0.02 Temp.Effect on Zero(%F.S/10℃)   0.03 0.017
 Repeatability(%F.S)  0.01 Temp.Effect on Span(%F.S/10℃)   0.02 0.014
 Creep(%F.S/30min)  0.02 Safe Overload (%F.S)   120
 Zero Balance(%F.S)     ± 2 Ultimate Overload(%F.S)   150
 Input Resistance(Ω)  405 ± 5 Defend Grade IP65
 Output Resistance(Ω ) 350 ± 5 Cable φ3, 0.42m

200 and 350 kG

Go here for pricing and online purchasing

803

803scheme

Dimensions in MM

638 pinout
 Rated Load(kg) 500
 Precision  C2 C3 Insulation Resistance(MΩ)   ≥5000(100VDC)
 Comprehensive  Error(%F.S)   0.03 0.02 Excitation Voltage(V)   9~12(DC) 
 Rated output(mv/v)   2 ± 0.0051 Compensated temp.Range(℃ )  -10~+40
 Non-linearity(%F.S)    0.03 0.017 Use Temp.  Range(℃ ) -35~+65
 Hysteresis(%F.S)   0.03 0.02 Temp.Effect on Zero(%F.S/10℃)   0.03 0.017
 Repeatability(%F.S)   0.01 Temp.Effect on Span(%F.S/10℃)   0.02 0.014
 Creep(%F.S/30min)    0.02 Safe Overload (%F.S)   150
 Zero Balance(%F.S)     ±1 Ultimate Overload(%F.S)   200
 Input Resistance(Ω)  400 ± 30 Defend Grade IP65
 Output Resistance(Ω ) 350 ± 3 Cable φ5, 3m

500 kG

Go here for pricing and online purchasing

 
2,500 LB-f Single Point Cantilever Load Cells
Features:

Alloy tool steel
Temperature compensation, both zero and span
Low sensitivity to axial loads
Through-Hole Mounting
 


Moisture protected
Compatible with international standard fixings Includes 20 feet of 4 conductor shielded cable
Trade certified for OIML 3,000D

Specifications:

  • Rated output 3mV/V±0.25%
  • Non-linearity 0.03%
  • Hysteresis 0.03%
  • Non-repeatability 0.02%
  • Creep in 20 minutes 0.03%
  • Temperature effect span 0.015% /10C
  • Temperature effect zero 0.026% /10C
  • Compensated temperature range -10C - 40C
  • Operating temperature range -40C to 65C
  • Zero balance ±1%
  • Input resistance 385±15*
  • Output resistance 350± 3*
  • Safe overload 150%
  • Ultimate overload 300%
  • Excitation voltage 10VDC
  • Maximum excitation voltage 15VDC
  • Insulation resistance >2000M*
  • Environmental protection IP67
  • All specifications are shown as a maximum percentage of full scale unless otherwise stated.
Load Cell Pinout:

RED + Excite
BLACK - Excite

GREEN + Signal
WHITE - Signal

2,500 LB-f 
Load Cell


 

 

Download typical load cell mounting instructions here, 9 k PDF file

What do terms like hysteresis, non-linearity, and repeatability mean?


Got something big you want to burn?  4,000 lbf load cell

4,000 lbf Load Cell
SENSORTRONICS Model # 65023-4K. 
Capacity: 4000 LBS. FSO: 3.001 mV/V

350 ohms

Hysteresis and non-repeatability is .02%; creep and non-linearity is .03% of full scale!! 
This means for a 4000 pound load cell you can get accuracy to 1.2 pounds!

Nickel plated steel construction with 50 feet of shielded cable. 
Brand new, in the box, never used!  Includes calibration certificate and QA data from factory.

Simple to mount on most any test stand.

Go here for pricing and online purchasing

Spec Sheet (click to enlarge)

sensotronics 4k-lbf


 
 
 




The following is a nice explanation of how the load cell functions and interfaces with your data acquisition system, courtesy of Massload. 
 
  System Components: In contemporary control applications, weighing systems are used in both static and dynamic applications. Some systems are technologically advanced, interfacing with computers for database integration and using micro-processor based techniques to proportion material inputs and feed rates. To send the weight information to computers, signal conditioners are utilized to permit direct communication from the load cell via conversion of the load cellís analog signal to a digital signal.

An entire system can be constructed, one piece at a time, from   basic modules.

Parts of a system can include: 

  • Load cells 
  • Cable 
  • Junction Box (summing up the load cell signals up to one output),
  • Instrumentation (indicators, signal conditioners, etc), 
  • Peripheral Equipment (printers, scoreboards, etc.)
Fundamentals: A load cell is classified as a force transducer. This device converts force or weight into an electrical signal.

straingageThe strain gage is the heart of a load cell. A strain gage is a device that changes resistance when it is stressed. The gages are developed from an ultra-thin heat-treated metallic foil and are chemically bonded to a thin dielectric layer. "Gage patches" are then mounted to the strain element with specially formulated adhesives. The precise positioning of the gage, the mounting procedure, and the materials used all have a measurable effect on overall performance of the load cell.
 
 

example of gage deformationEach gage patch consists of one or more fine wires cemented to the surface of a beam, ring, or column (the strain element) within a load cell. As the surface to which the gage is attached becomes strained, the wires stretch or compress changing their resistance proportional to the applied load. One or more strain gages are used in the making of a load cell.

Multiple strain gages are connected to create the four legs of a Wheatstone-bridge configuration. When an input voltage is applied to the bridge, the output becomes a voltage proportional to the force on the cell. This output can be amplified and processed by conventional electrical instrumentation.wheatstone-bridge
 
 
 
 
 
 
 
 
 
 

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