Sensors & Transducers


Small strain sensors

November 2010 Sensors & Transducers

Baumer now offers a sensor for indirect force measurement which can be used in the packaging industry, engineering, wind energy plants and many other industrial applications. The DSRT is a small strain sensor with high resolution offered with measuring ranges from 0-100 μ up to 0-750 μ (micro strain: μm/m).

The strain sensor is suitable for all static and dynamic applications and can be used wherever strains are expected, eg, for process control in presses and punching machines, for monitoring blade deflection in wind energy plants, or for sheet metal forming applications in the packaging technology. The indirect force measurement enables the control and traceable documentation of forces in the process. It also guarantees the repeatability of the individual processes, thus ensuring consistent quality.

The DSRT has an integrated low-noise bridge amplifier with an analogue signal path and a high cut-off frequency (1 kHz). The available output signals are analogue current or voltage signals (4-20 mA, ±10 VDC, mV/V) and a CANopen interface. The sensor offers high reliability, long-term stability, overload protection, and repeatability in an IP67 protected package.

Since the strain sensor is screwed on to the strain-stressed parts of the machine, it offers many advantages compared to glued strain gauges (SG): it is reusable, can be mounted much faster and easier, is replaceable without recalibration, and offers very high application security. The DSRT allows cost-efficient measurement especially of high forces in an 80x26x17 mm housing.



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