Measuring amplifiers with bus interfaces (OIML)

Measurement amplifiers with bus interfaces & OIML – Precise signal processing for industrial weighing technology and automation

Measurement amplifiers with bus interfaces and OIML approval are designed for the precise processing, amplification and transmission of sensor signals in industrial measurement and weighing systems. They are used wherever measurement data needs to be reliably acquired, digitally processed and integrated into higher-level control or automation systems.

These measurement amplifiers are frequently used in applications involving:

• Load cells
• Force sensors
• Torque sensors
• Pressure sensors
• Industrial process measurement technology

They provide stable and highly accurate signal conditioning, even in demanding industrial environments.

Thanks to integrated bus interfaces such as:

• CANbus
• Modbus
• Profibus
• Ethernet
• RS232 / RS485

the systems can be easily integrated into modern automation and control systems.

OIML-certified measurement amplifiers also meet international requirements for legal-for-trade weighing systems, making them ideal for industrial weighing applications subject to statutory metrology requirements.

How measurement amplifiers with bus interfaces & OIML work

Measurement amplifiers acquire the input signals from sensors – typically in the mV/V range – and amplify and digitize them for further processing. The devices perform several functions:

• Precise signal amplification
• Filtering and signal conditioning
• Analog-to-digital conversion
• Communication with control and monitoring systems

Via integrated bus interfaces, measurement data is transmitted directly to PLCs, industrial PCs or SCADA systems. OIML-certified devices meet additional requirements regarding measurement accuracy, long-term stability, traceability and legal-for-trade signal processing.

This makes them particularly suitable for applications in industrial weighing technology and legally regulated measurement systems.

Typical applications

Measurement amplifiers with bus interfaces and OIML approval are used in a wide range of industrial applications:

• Industrial weighing technology
• Dosing and filling systems
• Force and load measurements
• Mechanical and plant engineering
• Process automation
• Test benches and testing systems
• Food and packaging industry
• Chemical and pharmaceutical industry

How to select the right measurement amplifier with bus interface

Selecting the right measurement amplifier depends on the requirements of the application, the sensors used, and the communication and accuracy requirements.

• Sensor compatibility
  The measurement amplifier should support the sensors being used, such as load cells or force sensors with an mV/V output.
• Required bus interfaces and protocols
  Depending on the automation system, different interfaces such as CANbus, Modbus, Ethernet or RS485 may be required.
• Measurement accuracy and resolution
  High resolution and low measurement deviation are essential for precision applications or legal-for-trade systems.
• OIML approval and certifications
  For applications subject to legal metrology requirements, appropriate OIML or other relevant approvals should be considered.
• Signal processing and filter functions
  In industrial environments, stable filtering and signal processing functions are important for minimizing interference.
• Mounting and design
  Depending on the installation situation, DIN-rail, panel-mount or compact module versions may be suitable.
• Environmental conditions
  Temperature, humidity, vibration and electromagnetic influences must be taken into account.
• Integration into existing systems
  Easy integration into PLC, SCADA or industrial PC systems simplifies commissioning and operation.

The experts at Althen Sensors & Controls will be happy to help you select the right measurement amplifier for your application. Contact us!

Advantages of measurement amplifiers with bus interfaces

• Precise signal processing and high measurement accuracy
  Reliable amplification and digitization of even the smallest sensor signals.
• Easy integration into industrial networks
  Support for modern bus interfaces and communication protocols.
• OIML approval for legal-for-trade applications
  Suitable for industrial weighing systems subject to statutory requirements.
• High long-term stability and reliability
  Optimized for continuous operation in industrial environments.
• Flexible connection of a wide range of sensors
  Compatible with load cells, force sensors and other transducers.
• Robust industrial design
  Suitable for demanding production and process environments.