Althen Sensors / ALF218 Cylindrical Force Sensor

Compact and robust force sensor for compression force measurements up to 400 kN. Ideal for dynamic and high-impact industrial applications.

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Description

ALF218 Cylindrical Force Sensor

Key features
  • Compression force ranges up to 400 kN
  • Rugged sealed design with IP65 protection
  • High stiffness: up to 6.8 x 10⁹ N/m
  • Low non-linearity: ±0.5% RL
  • High repeatability: ±0.02% RL
  • Output options: 2.3 mV/V or rationalised 2.0 mV/V
Performance highlights

The ALF218 is a high-capacity compression force sensor designed for engineering-grade force measurement tasks. With a small cylindrical form factor and domed top load face, it offers a robust design capable of handling non-sacrificial impact forces. Rated loads range from 100 kN to 400 kN, with excellent repeatability and linearity.

Usage conditions

With a sealed IP65 housing and a temperature-compensated range of -10 to +50 °C, the ALF218 ensures stable operation in industrial environments. The safe overload limit is 150% of rated load, and the ultimate overload threshold is 400% of RL.

Possible applications:
  • Impact force testing in automotive or material labs
  • Compression monitoring in press-fit assembly lines
  • Structural load testing in civil engineering
  • OEM applications requiring high structural stiffness
Advantages of choosing this product

The ALF218 offers precision measurement with robust build quality and high repeatability. Its rationalised output option simplifies multi-sensor system integration. With a wide range of rated capacities, it suits both R&D and production environments.

Other important features:
  • Nominal rated output: 2.3 mV/V
  • Rationalised version: 2.0 mV/V ±0.5% RL
  • Bridge resistance: 700 Ω
  • Compensated temperature range: -10 … +50 °C
  • Operating temperature: -10 … +80 °C
  • Weight: 0.75 to 1 kg
  • 2 m PVC-insulated 4-wire cable
Technical Specifications
Specification Value
Rated load 100 kN / 200 kN / 400 kN
Calibration Compression
Non-linearity, terminal ±0.5% RL
Hysteresis ±0.5% RL
Creep (20 min) ±0.05% AL
Repeatability ±0.02% RL
Rated output (nominal) 2.3 mV/V
Rated output (rationalised) 2.0 mV/V ±0.5% RL
Zero load output ±4% RL
Temp. effect on rated output ±0.005% AL/K
Temp. effect on zero output ±0.005% RL/K
Compensated temp. range -10 … +50 °C
Operating temp. range -10 … +80 °C
Supply voltage (recommended) 10 V
Supply voltage (max) 20 V
Bridge resistance 700 Ω
Insulation resistance (min at 50 VDC) 500 MΩ
Safe overload 150% RL
Ultimate overload 400% RL
Sealing IP65
Weight ~0.75 to 1 kg
Cable 2 m PVC insulated, 4-core
Structural stiffness (100 kN) 1.7 x 10⁹ N/m
Structural stiffness (200 kN) 3.4 x 10⁹ N/m
Structural stiffness (400 kN) 6.8 x 10⁹ N/m

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