• High performance
  • Misalignment error compensation
  • Excellent Sideload rejection < 1%RL error for 20%RL transverse loads and much less for vectors
  • Formulaic error quantification
  • Traceable calibration with certificate included in the standard price
  • Standard 2 year warranty

F300 Sideload Rejection Loadcell

Benefiting from advanced machining techniques, the F300’s complex beam structure offers reliable error compensation in a cylindrical, 'donut' style footprint.

Whereas the long established 'donut' products such as the F202 require near perfect loading conditions, the F300's unique strain system compensates for typical axial misalignment as well as the combination of large sideloads and small moments. This has been used to good effect in ‘Junkers’ test machines, subjected to an extreme, rapid cycling of large sideloads, for bolt tension and 'self-loosening' fastener tests. Further details of this application, along with simple error equations for the F300 loadcell can be found in Engineering Sheet E036.

The circular patterns of fixing holes are deliberately over engineered to withstand potentially large moment effects and allow tension, compression and bi-directional versions as standard. There is also the added potential for customer supplied adaptor plates to give versatile end fixing options. Note that care should be taken to ensure the correct lengths of screws are used and that these are torqued correctly as given in E036.

We are happy to design variants of this loadcell to meet your specific requirements. Ranges above 5kN can be manufactured for fully compensated operation up to +250°C. Please consult our engineering department for further information.

Details of our other loadcell families can be found in the Product Guide.

Ordering Codes

See the loadcell ordering code sheet for more details. Add range in the required force units.
F300CFR0K0 Compression, unrationalised F300CFR0KN Compression, rationalised
F300TFR0K0 Tension, unrationalised F300TFR0KN Tension, rationalised
F300UFROK0 Bi-directional, unrationalised F300UFR0KN Bi-directional, rationalised

F300 Specification

Parameter Value Unit
Non-linearity - Terminal ±0.03 % RL
Hysteresis ±0.03 % RL
Creep - 20 minutes ±0.05 % AL
Repeatability ±0.02 % RL
Rated output - Nominal 1.2 mV/V
Rated output - Rationalised 1.0 mV/V
Rationalisation tolerance (applies to single direction calibrations) ±0.1 % RL
Output symmetry ±0.2 %AO
Fatigue life 108 ±RL cycles
Zero load output ±4 % RL
Temperature effect on rated output per °C ±0.005 % AL
Temperature effect on zero load output per °C ±0.01 % RL
Temperature range - Compensated -10 to +50 °C
Temperature range - Safe -10 to +80 °C
Excitation voltage - Recommended 10 V
Excitation voltage - Maximum 20 V
Bridge resistance 700 Ω
Insulation resistance - Minimum at 50Vdc 500
Overload - Safe 100 % RL
Overload - Ultimate 200 % RL
Maximum permissible sideload 60 % RL
Maximum permissible moment See reference chart in E036  
Sealing IP65  
Weight - Nominal (excluding cable) See outline drawing  

Ranges up to 5kN are manufactured in aluminium; all other ranges are manufactured in stainless steel.

Structural stiffness - Nominal

Range (kN) Stiffness (N/m) Range (kN) Stiffness (N/m) Range (kN) Stiffness (N/m)
1 2.0 x 107 10 2.2 x 108 100 2.2 x 109
2 5.7 x 107 20 6.1 x 108 200 6.5 x 109
5 2.2 x 108 50 2.5 x 109 400 2.4 x 1010


  1. AL = Applied load.
  2. RL = Rated load.
  3. Temperature coefficients apply over the compensated range.
  4. AO=Average of tension and compression outputs for full load.


For ranges up to 50kN the loadcell is fitted with 2 metres of PVC insulated 4 core screened cable type 7-2-4C. Ranges above 50kN are fitted with 16-2-4C cable.

Excitation + = Red, Excitation - = Blue, Signal + = Yellow, Signal - = Green, Screen = Orange.

Reverse the signal connections to obtain a positive signal in tension mode. The screen is not connected to the loadcell body.

For rationalised ranges up to 5kN the resistors are housed in a capsule located in the loadcell cable 100mm from the free end. Capsule dimensions are Ø10mm by 57mm.

Additional Information

Outline Outline drawing of the product.
STEP file STEP files for standard ranges.
Stock List Loadcell availability.
PDF data-sheet Printable data-sheet. Right click on the link to download the file.