Improved performance and connectivity for strain gauges

Thanks to the analogue output and IO-Link interface, the measuring amplifier can be easily connected to other systems and integrated into the production environment.

Strain gauge sensors are widely used in a variety of industrial applications, such as quality control in manufacturing, robotic force measurement, material testing and torque and pressure monitoring. To simplify the integration of strain gauge sensors, the Kistler Group has now developed the new 4709A strain gauge amplifier with an integrated IO-Link interface. It offers plenty of new features tailored to smart factories and digital manufacturing.

High-accuracy, low-noise strain gauge amplifier

The 4709A strain gauge amplifier from Kistler features a 24-bit ADC resolution and an 8 kSps sampling rate, enabling it to capture measurements with great precision. Its high resolution reduces signal distortion and ensures reliable data collection, even when measuring extremely small signal variations from strain gauges. Thanks to the amplifier's low-noise design, users get clean, stable signals, which minimises errors and improves measurement quality.

Designed for versatility, the strain gauge amplifier offers both analogue output and a fully integrated IO-Link interface. The analogue output ensures compatibility with conventional monitoring systems, while IO-Link connectivity enables direct integration into modern industrial networks, enhancing real-time data transmission and automation. This dual-output capability of the measuring amplifier builds a bridge between legacy and Industry 4.0 systems.

Smart signal conditioning and processing features

The strain gauge amplifier is equipped with multiple signal processing features to optimize performance. These include selectable low-pass filters to reduce high-frequency noise, a peak value memory to record high measured values such as force spikes and mechanical stress, and a sample-and-hold functionality. It allows the amplifier to store a measured signal at a specific moment - for example to prevent fluctuations and ensure consistency in fast-changing applications.

Thanks to its IO-Link compatibility, the strain gauge amplifier can be fully parameterised remotely, allowing users to adjust settings without physical access to the device. Users can configure parameters such as process input units (N, kg, etc.) and alarm state configurations (alert triggers, thresholds, etc.). To control external systems based on sensor signals two digital switching points are available on the device.

High durability, advanced diagnostics and safety functions

Protected by an IP65-rated aluminium housing, the strain gauge amplifier is designed to withstand harsh industrial environments. Its rugged construction makes it resistant to dust, moisture and extreme temperatures (-40degC to 85degC). Besides, the 4709A comes with built-in error detection and self-diagnostics, and it alerts the user via IO-Link in the event of anomalies. Additionally, the new measuring amplifier features short-circuit and reverse polarity protection.

Thanks to these features, the strain gauge amplifier from Kistler ensures precise and reliable operation even in challenging conditions such as heavy machinery, production lines and outdoor applications.