QuantumX 4‑channel Full-bridge Strain Gauge Amplifier

MX430B: Precision Strain Gauge Measurement

The MX430B is a compact, high‑precision 4‑channel amplifier designed specifically for strain gauge full‑bridge transducers. It delivers exceptional accuracy, outstanding interference suppression, and seamless integration into the modular QuantumX data acquisition system making it ideal for both static and highly dynamic measurement tasks.

Key features

• Four full‑bridge strain gauge inputs, galvanically isolated
• Accuracy class: 0.01 (100 ppm)
• Scalable ±10 V analog BNC outputs per channel
• Variable bridge excitation voltage:
  • Carrier frequency (CF): 600 Hz sine, bandwidth up to 200 Hz
  • DC excitation for high‑dynamic measurements with bandwidths up to 6 kHz
• Digital low‑pass filters (Bessel, Butterworth, linear phase) for clean, stable signals
• Measuring ranges: 2.5 or 5 mV/V
• Up to 10 V bridge excitation
• Supports 6-wire circuit
• Data rates up to 40 kS/s per channel
• Scaling: 2-point/gain + offset, table, polynomial, multi-polynomial
• Real-time matrix compensation calculation to connect multi-component sensors
• Fast sensor check (shunt)
• TEDS support
• 1 × Ethernet port with PTP support
• 2 × FireWire ports
• Patented background adjustment and calibration (AutoCal)
• Working standard calibration certificate according to ISO10012 stored in the module
• DAkkS certificate (ISO17025) available upon request

See the MX430B datasheet for a full list of features and specifications.

For high‑dynamic testing where stability is essential

The MX430B captures physical quantities from full‑bridge strain gauge transducers by exciting the bridge (AC or DC) and converting the resulting mV/V signal into precise digital data. Its carrier-frequency excitation effectively suppresses electromagnetic and thermal interference, while DC excitation supports high‑dynamic applications up to 6 kHz bandwidth. The amplifier’s flexible excitation is available on each channel, enabling you to configure the channel according to sensor type or test scenario.

Its patented background calibration technology ensures long‑term stability during repetitive and long‑duration testing. And with its sturdy design that is both compact and lightweight, the MX430B is completely portable, allowing you to perform machine and sensor calibration tasks as well as field use.

Typical applications

• Force, torque, and pressure measurement using strain gauge full‑bridge sensors
• Aerodynamic testing in wind tunnels for vehicles, aircraft, and sports equipment
• Center of gravity and load distribution analysis, including aerospace structures
• Engine and general test benches requiring accuracy and repeatability
• Machine and sensor calibration during field service due to lightweight portability

Ready for any system architecture

With built-in TEDS support, which provides automatic transducer identification, and minimal wiring needs, the setup of tests is simplified. As part of the QuantumX family, the MX430B is fully compatible with other QuantumX modules for distributed setups and system scalability synchronized measurements provided by FireWire and Ethernet PTPv2 support.

Real-time integration into control systems is possible thanks to directly scalable voltage outputs (±10 V) with optional filter, an EtherCAT^® connection using QuantumX Gateway CX27C, or via CAN using CAN FD Input/Output Module MX471C.

When combined with catman^® software for data recording and data analysis, the MX430B forms a complete, high‑performance measurement chain from sensor to data.

MX430B can be purchased either stand-alone or as part of a software/hardware bundle:

• Basic data acquisition and visualization: MX430B + catmanEASY
• Data acquisition, data visualization, analysis and report generation: MX430B + catmanAP

Stay connected with the latest firmware and software

All QuantumX modules are delivered with the latest firmware. For existing modules, it is easy to update the firmware by simply downloading the latest firmware package.

HBK also provides both native and third-party software packages and drivers allowing you to fully leverage the QuantumX ‘open’ data acquisition infrastructure for integration with a great number of operating, analysis and automation software. This includes:

• MX Assistant: a modern and free device or system assistant that supports all module functions
• catmanEASY / AP / Enterprise: The standard DAQ software used with the QuantumX platform
• Third-party drivers: For example, LabVIEW™, Visual Studio^® .NET and CANape^®

Go to our download site for more information and a complete list of options.

Did you know? You can also connect Tescia data acquisition software to your QuantumX module via the MX Assistant utility. Talk to one of our experts to find out more.