Special force transducers

What is a strain transducer or extensometer?

Strain transducers, also called strain sensors or extensometers, are a special type of force sensor and are versatile, being suitable for both static and dynamic measurements. Strain transducers are used to measure deformations that have occurred due to forces acting on an existing body. The strain transducer is quick to install due to the simple screw-on design and can achieve high accuracies, despite the indirect measurement. After mounting and adjustment, the strain is transferred by a frictional connection from the solid element to the strain transducer. Since the transducer is screwed onto the component during use, after adjustment, the unit has the characteristics of a force transducer.

For which applications is a strain transducer used?

The use of strain transducers is particularly suitable for existing systems. In an existing silo or tank, the retrofitting of bending or shear beams for force measurement can be very costly. The strain gauge, on the other hand, is quickly integrated into the application and is a cost-effective alternative. WIKA strain transducers have a high shock and vibration resistance as well as a good long-term stability. Read more about the applications of strain transducers / extensometers in our blog post “Practical applications of strain transducers”.

Possible areas of application:

• Injection moulding machines
• Pressing, punching, embossing machinery
• Steel constructions and vessel supports
• Windpower plants
• Construction machinery

From what strain can a strain transducer be used?

The strain transducer or extensometer can be used from a strain or compression from 0 … 200 µε up to a max. of 0 … 1,000 µε. The extensometer achieves an overall accuracy of 2 % of the full scale value. For the measurement, the force transducer is fixed to the component using bolts in the area where the corresponding strain occurs.