Triaxial IEPE Accelerometers for Vibration Analysis

Triaxial IEPE Accelerometers are advanced vibration sensors designed to measure acceleration simultaneously along three orthogonal axes (X, Y, and Z). By capturing vibration data in all directions from a single mounting point, these sensors provide a complete and accurate representation of dynamic behavior, making them essential for modern vibration testing, structural analysis, and condition monitoring applications.

Unlike single-axis accelerometers, triaxial IEPE accelerometers eliminate the need for multiple sensors and repeated test setups. This not only reduces installation time and measurement uncertainty but also ensures that directional vibration components are captured under identical conditions. The result is higher data integrity and more efficient testing workflows.

Operating Principle

Triaxial IEPE accelerometers are based on the piezoelectric effect and incorporate Integrated Electronics Piezoelectric (IEPE) signal conditioning within the sensor. Each axis contains its own piezoelectric sensing element, producing an electrical charge proportional to acceleration in that direction. The integrated electronics convert this charge into a low-impedance voltage signal that can be transmitted reliably over standard coaxial cables.

IEPE technology allows both power and signal to be carried on the same cable using a constant current supply, simplifying wiring and reducing susceptibility to noise. This makes triaxial IEPE accelerometers especially well suited for multi-channel and large-scale measurement systems.

Key Characteristics

Triaxial IEPE accelerometers offer excellent sensitivity, wide frequency response, and strong axis-to-axis matching. Their compact and rigid construction minimizes cross-axis sensitivity and ensures accurate directional measurements. Because all three axes are measured from the same physical location, phase alignment and correlation between directions are inherently consistent.

These sensors are designed for stable performance under continuous vibration, temperature variation, and mechanical stress, making them suitable for both laboratory testing and long-term industrial monitoring.

Typical Applications

Triaxial IEPE accelerometers are widely used in:

• Modal and Structural Dynamics Testing: Capturing multi-directional vibration behavior

• Machinery Vibration Analysis: Detecting imbalance, misalignment, looseness, and bearing faults

• Automotive & Transportation: Measuring vibration on engines, suspensions, and vehicle structures

• Aerospace & Defense: Structural qualification, component testing, and flight vibration analysis

• Electronics & Precision Equipment: Evaluating vibration sensitivity of compact or lightweight assemblies

In many of these applications, three-axis data is critical for understanding true vibration modes and dynamic response.

Integration with Measurement Systems

Triaxial IEPE accelerometers are fully compatible with Dynatronic data acquisition and vibration monitoring systems. When synchronized with parameters such as force, strain, velocity, or temperature, they enable comprehensive multi-physics analysis. This integrated measurement approach helps engineers identify root causes, validate designs, and improve product reliability.

Complete Vibration Insight from a Single Sensor

By delivering accurate, synchronized three-axis vibration data in a single compact device, triaxial IEPE accelerometers significantly improve measurement efficiency and insight. They are an essential tool for engineers who require reliable, directionally complete vibration data to support testing, diagnostics, and validation in complex dynamic systems.