QuantumX 2‑channel High-Precision Full-bridge Amplifier

MX238B: Strain Gauge Measurements with an Accuracy of 25 ppm

The QuantumX MX238B is a compact, two‑channel high-precision module engineered for exceptionally accurate full‑bridge transducer measurements. With an 0.0025 accuracy class (25 ppm), patented calibration technology, and seamless system integration, it delivers trustworthy results for demanding applications where every detail counts.

Key features

• Two high‑precision full‑bridge strain gauge inputs (accuracy: 25 ppm)
• 225 Hz carrier‑frequency (CF)
• 24‑bit A/D conversion
• Galvanically isolated inputs for maximum signal integrity
• Digital Bessel and Butterworth low‑pass filters
• Data rates up to 40 kS/s
• Bridge excitation: 2.5 or 5 V
• Measuring range: 2.5 or 5 mV/V
• Measurement frequency range: 0 to 50 Hz
• Patented background adjustment and calibration
• TEDS support
• Ethernet with PTPv2 for synchronized multi‑module setups within the QuantumX ecosystem
• Factory calibration to DIN/ISO10012 stored in module, with optional DAkkS (ISO17025) certification upon request

See the MX238B datasheet for a full list of features and specifications.

Ideal for highly precise measurements

MX238B’s ultra‑high accuracy and long-term stable data acquisition – through its patented background calibration – is perfect for static and quasi‑static measurements that require superior stability and reliability. Its portable and compact design and exceptional robustness, with strong immunity to electromagnetic interference and temperature influences, makes the MX238B suitable for both laboratory and portable use whether performing on-site servicing or other reference measurement tasks.

Typical applications

• Calibration laboratories and reference chains for torque, force, and pressure transducers
• Wind tunnels and other research environments where stable, low‑noise data is critical
• Static and quasi‑static measurements in advanced testing and development setups
• Portable field servicing requiring compact yet laboratory‑grade measurement performance

High‑performance strain gauge measurements

The MX238B measures signals from full‑bridge transducers, providing exceptional resolution and long‑term stability. Its carrier‑frequency excitation, 24‑bit conversion, and background calibration ensure clean, drift‑free, high‑precision readings—even in electrically noisy environments.

Ready for any system architecture

With built-in TEDS support that provides automatic transducer identification, flexible parameterization and minimal wiring, setup is nearly effortless setup. System integration is based on the QuantumX modular architecture for truly scalable, synchronized measurement systems with FireWire and Ethernet PTPv2 support. As part of the QuantumX platform, MX238B becomes a flexible building block that can be synchronously expanded with a multitude of QuantumX modules.

When you add in catman^® software for data recording and data analysis, you achieve a true plug‑and‑measure setup where torque, force, pressure data can be immediately visualized, stored or digitally forwarded.

MX238B can be purchased as stand-alone or part of a software/hardware bundle.

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.