ALF251 Miniature force sensor

Compact miniature force sensor for highly accurate tension and compression force measurement in confined spaces. The ALF251 is ideal for OEM equipment, industrial automation, laboratory testing and precision engineering applications requiring reliable force measurement.

View technical specifications

Key features

Available for tension, compression or bidirectional force measurement
Compact 20 mm diameter diaphragm design
Measuring ranges from 100 N to 3.2 kN
Hardened stainless steel body (aluminium for ranges up to 200 N)
IP65 environmental protection
Traceable calibration certificate included

Compact miniature force sensor for accurate force measurement

The ALF251 miniature force sensor is designed for highly accurate force measurement in applications where installation space is limited. With its compact 20 mm diameter diaphragm design, the ALF251 delivers reliable performance for compression, tension and bidirectional force measurement while remaining easy to integrate into OEM equipment and test systems.

Available in both load button and threaded stud versions, the ALF251 offers flexibility for a wide range of industrial and laboratory applications. The load button version is intended for compression measurements, while the stud version supports tension, compression or bidirectional force measurement.

Performance highlights

The ALF251 is available with measuring ranges of 100 N, 200 N, 400 N, 800 N, 1.6 kN and 3.2 kN, making it suitable for both low-force precision measurements and higher industrial loads.

Every sensor is supplied with a traceable calibration certificate as standard, ensuring reliable and repeatable measurement performance. The bidirectional versions are individually calibrated for both tension and compression, with separate output values stated on the calibration certificate.

Usage conditions

For optimum accuracy, the applied force must act directly through the central loading axis. The ALF251 operates over a temperature range of -10°C to +80°C and is protected to IP65, making it suitable for demanding industrial environments.

Ranges up to 200 N are manufactured from aluminium to maximise sensitivity, while all higher capacities are manufactured from hardened stainless steel for increased strength and durability. The sensor is supplied with a 2 metre screened PVC cable for easy installation.

Possible applications

OEM machinery
Industrial automation
Laboratory testing
Scientific research
Material testing
Force monitoring systems
Medical devices
Robotics
Assembly and production equipment
Precision engineering
Process control
Static and dynamic testing

Advantages of choosing the ALF251

The ALF251 combines compact dimensions with a broad measuring range of up to 3.2 kN, making it suitable for applications where both space and measurement accuracy are critical.

Its versatile design supports compression, tension and bidirectional measurement, while the robust IP65 construction ensures dependable operation in demanding environments. Customer-specific variants are also available for specialised applications.

Other important features

Miniature diaphragm force sensor
Compression, tension and bidirectional calibration
Load button and threaded stud versions
Nominal output of 1.6 mV/V
Rationalised 1.0 mV/V output available
IP65 protection
Standard one-year warranty
Custom variants available on requestels

Do you need this sensor for your next project?

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Alf251 miniature force sensor

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Not exactly what you are looking for? We offer standard sensors, but can also help you with sensors adapted for you or a fully customised measurement solution. Contact us for advice or pricing.