• Only 50g mass
  • High performance
  • All titanium construction
  • Ultra light weight cable
  • Connector for easy cable replacement
  • Traceable calibration with certificate included in the standard price

F305 Seat Belt Tension Loadcell

The F305 is a high performance loadcell for measuring seat belt tension forces. Its geometry was created by computer program to generate an optimal design with minimal mass, material usage, stress and deflection. The outer bars can easily be removed allowing fitting to a seat belt while it is anchored at both ends.

The performance figures are typical values and are dependant on belt type. We can carry out a 5 point calibration using a 2 metre sample of customer supplied belt to reduce application errors. The calibration data can be used to reduce non-linearity errors in test results.
We are happy to design variants of this loadcell to meet your specific requirements. Please consult our engineering department.

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.
F305TF00H0 Tension, unrationalised

F305 Specification

Parameter Value Unit
Non-linearity - Terminal ±3 % RL
Hysteresis ±1 % RL
Creep - 20 minutes ±0.05 % AL
Repeatability ±0.2 % RL
Rated output - Nominal 1.5 mV/V
Zero load output ±4 % RL
Temperature effect on rated output per °C ±0.005 % AL
Temperature effect on zero load output per °C ±0.007 % RL
Temperature range - Compensated -10 to +50 °C
Temperature range - Safe -10 to +80 °C
Excitation voltage - Recommended 10 V
Excitation voltage - Maximum 10 V
Bridge resistance 350 Ω
Insulation resistance - Minimum at 50Vdc 500
Structural stiffness (normal to belt axis) 1.9 x 107 N/m
Overload - Safe 30 % RL
Overload - Ultimate 100 % RL
Weight - Nominal (excluding cable) 50 g

The standard range is manufactured in titanium.


  1. AL = Applied load.
  2. RL = Rated load.
  3. Temperature coefficients apply over the compensated range.


The loadcell is fitted with 2 metres of miniature PVC insulated 4 core screened cable.

Excitation + = Red, Excitation - = Black, Signal + = White, Signal - = Green, Screen = Orange.

The screen is not connected to the loadcell body.

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.