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ALF232 | ALF233 Dual or triple axis load cell

Multi Axis Load Cells ALF232 and ALF233

The ALF232 measures forces in two axes at 90° and the ALF233 measures forces in 3 mutually perpendicular axes. Apart from error evaluations, each output is pure and requires no mathematical manipulation. The load cell is moment sensitive requiring calibration to be carried out at a specified force centre. The standard centre is specified in the specification. If this is not suitable for your application please consult our engineering department about alternative calibrations.

The ALF232/3 is ideally suited to many industrial and scientific applications, including automotive and medical research.

The load cell can be manufactured with force ranges to suit the application. The Z axis can have a different force range from the X and Y axes. Please consult our engineering department about the viability of the required ranges. The example shown in the picture and drawing is a ±500 N model; there will be small differences in the dimensions for other ranges.

Specifications

Parameter Value

Rated load:

±100 N to ±5 kN

Calibration:

Compression, tension or bi-directional

Non-linearity, terminal:

±0.5 % RL

Hysteresis:

±0.5 % RL

Creep, 20 min:

±0.1 % AL

Repeatability:

±0.02 % RL

Maximum cross talk:

3 % RL

Calibration force center:

x = 0, y = 0, z = -4.5 mm

Rated output, nominal:

1.2 mV/V

Zero load output:

±4 % RL

Temperature effect on rated output:

±0.005 % AL/K

Temperature effect on zero load output:

±0.01 % RL/K

Compensated temperature range:

-10 … +50 °C

Operating temperature range:

-10 … +80 °C

Supply voltage, recommended:

10 V

Supply voltage, max.:

10 V

Bridge resistance:

X and Y axis: 350 Ohm
Z axis: 700 Ohm

Insulation resistance, min. (at 50 VDC):

500 MOhm

Overload, safe:

150 % RL

Overload, ultimate:

200 % RL

Weight (excl. cable):

approx. 200 g

Material:

Aluminium or stainless steel, depending on load range
Rated Load Structural Stiffness, nominal

100 N (per axis)

4.3 x 106 N/m

5 kN (per axis)

2.1 x 108 N/m

Notes:

  1. RL = rated load
  2. AL = applied load
  3. Temperature coefficients apply over the compensated range.
  4. Values apply to all axes unless otherwise specified.

Dimensions

Dimensions of load cell ALF233

Model with 500 N rated load (example)

Dimensions in „mm“, approx. values.

These drawings are for information only and not intended for construction purpose. Please contact us for detailed drawings.

Electrical Connections

The ALF232 is fitted with 2 m of PVC insulated 9 core screened cable type 7-1-9C. The ALF233 is fitted with 2 m of PVC insulated 12 core screened cable type 7-1-12C.

Wiring:

Function X Axis Y Axis Z Axis

+supply voltage

red

violet

orange

-supply voltage

blue

black

turquoise

+output signal

yellow

brown

pink

-output signal

green

white

grey

screen

orange (thick)

The screen is not connected to the load cell body.

Ordering Information

ALF232-Zxxxx

2 axis loadcell

ALF233-Zxxx

3 axis loadcell

Most ALF232/3 load cells are manufactured to special requirements and are given an ALF232-Zxxxx or ALF233-Zxxxx number.
Please add range in the required units.

Safety Note

When using the load cell in tension mode it is essential to provide additional safety precautions like safety chains etc. for catching the load in a breakage, which cannot be excluded completely.

Information in the PDF datasheet (see above) may be more detailed. Due to continual product development, ALTHEN and partners reserve the right to vary the foregoing details without prior notice.