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F331 Fatigue Rated, High Stiffness, Low Range Loadcell, Rectangular Housing

Standard Ranges 0.5, 1, 2.5, 5, 10 and 20N (50gf to 2kgf)

  • High stiffness / Minimal deflection
  • Deflection is 100% translational
  • Resistant to sideloads and force vectors
  • High thermal stability
  • Fatigue rated
  • Standard 1 year warranty

Specification

Parameter

Value

Unit

Non-linearity - Terminal

±0.2

% RL

Hysteresis

±0.1

% RL

Creep - 20 minutes

±0.2

% AL

Repeatability

±0.02

% RL

Rated output - Nominal

0.6

mV/V

Rated output - Rationalised

0.5

mV/V

Rationalisation tolerance (applies to single direction calibrations)

±0.5

% RL

Output symmetry

±1.0

% AO

Fatigue Life

108

RL cycles

Zero load output

±10

% RL

Temperature effect on rated output per °C

±0.005

% AL

Temperature effect on zero load output per °C

±0.02

% 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

Overload - Safe

50

% RL

Overload - Ultimate

100

% RL

Weight - Nominal (excluding cable)

35

g

The standard range is manufactured in aluminium.

The F331 low range loadcell has been developed to meet a growing need for high resolution, low range force measurement with minimal translational deflection.

The high stiffness of these loadcells, combined with their robust construction, lends themselves particularly well to dynamic and/or fatigue applications.

The minimum fatigue life of 108 fully reversed RL cycles can be greatly extended if the cycles occur below full rated load.

Both the F328 and F329 loadcell product types offer excellent performance but rely on a comparatively low stiffness strain mechanism. The F329 in particular requires a reduced output sensitivity in order to maintain some level of robustness. The F331 on the other hand offers some advantages over both and also benefits from a purely mechanical resistance to sideloads and vectors. Sideloads up to 25% RL can be withstood for as little as 2% RL error. Similarly, misalignment of up to 3° swept 360° around the measurement axis typically yields no more than 1% RL error.

The strain section within the housing is a separate monocoque structure, allowing repairs to be made quickly and cheaply in comparison to other low range loadcells. Other housing designs and fixing arrangements are therefore possible. The F330 offers the same ranges and performance in a circular housing.

We are happy to design variants of this loadcell to meet your specific requirements. Please consult our engineering department.

Order Codes

Code

Description

F331CF00H0

Compression, unrationalised

F331TF00H0

Tension, unrationalised

F331UF00H0

Bi-directional, unrationalised

F331CF00HN

Compression, unrationalised

F331TF00HN

Tension, IP65, rationalised

F331UF00HN

Bi-directional, rationalised

Structural Stiffness - Nominal

Range (N)

Stiffness (N/m)

0.5

1.0 x 105

1

2.0 x 105

2.5

3.2 x 105

5

5.0 x 105

10

8.3 x 105

20

1.3 x 106

Notes

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

Connections

The loadcell is fitted with 2 metres of PVC insulated 4 core screened cable type 7-1-4C.

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.

Files

Type

Title

Download

Outline

Outline drawing of the product.

Download

STEP File

F331-C/T/U-F00H0 All standard ranges

Download