Low frequency (seismic) vibration sensors

Seismic / Low-Frequency Vibration Sensors – Precise Measurement of Minimal Vibrations

Seismic or low-frequency vibration sensors are specialized devices designed to measure very slow movements and low-frequency vibrations. They are used wherever even the smallest vibrations or movements must be detected with high accuracy—particularly in areas such as structural monitoring, geophysics, research, or precision measurement technology.

Unlike conventional vibration sensors, seismic sensors are specifically optimized for the low-frequency range down to quasi-static movements (near 0 Hz). This makes them ideal for applications where standard sensors reach their limits.

Seismic vibration sensors provide reliable data for monitoring structures, analyzing ground movements, or detecting subtle mechanical changes.

How Seismic Vibration Sensors Work

Seismic vibration sensors typically operate based on the principle of an inertial mass (seismometer principle) that is mounted relative to the sensor housing.

When the housing moves—due to vibrations or ground motion—the mass initially remains at rest due to its inertia. The relative movement between the mass and the housing is measured and converted into an electrical signal.

Depending on the sensor type, different technologies are used:

• Electrodynamic sensors for very low frequencies
• Servo-based systems for maximum precision and stability
• Capacitive measurement principles for high-resolution applications

These sensors enable precise measurement of vibration velocity, displacement, or acceleration in the low-frequency range.

Typical Applications

Seismic vibration sensors are used in a wide range of specialized applications:

• Structural and infrastructure monitoring
• Monitoring of bridges, buildings, and infrastructure
• Geophysical measurements and seismology
• Monitoring of ground movements and seismic activity
• Precision measurements in laboratories
• Machinery monitoring at very low frequencies
• Tunnel and mining applications
• Research and development

Advantages of Seismic / Low-Frequency Vibration Sensors

• High-precision measurement at very low frequencies
  Detection of vibrations down to near DC (0 Hz).
• High sensitivity
  Detection of the smallest movements and vibrations.
• Suitable for long-term monitoring
  Stable measurement values over extended periods.
• Ideal for structural and geophysical applications
  Optimized for applications where standard sensors are insufficient.
• Reliable signal quality
  Accurate and repeatable measurement data even for minimal movements.

How to Choose the Right Seismic Vibration Sensor

Selecting a suitable sensor strongly depends on the application, particularly with regard to low-frequency requirements.

• Frequency range (especially low frequencies)
  The sensor must be specifically designed for the desired frequency range—especially for very low frequencies down to near 0 Hz.
• Sensitivity and resolution
  High sensitivity is essential for measuring very small movements.
• Measured variable (displacement, velocity, or acceleration)
  Depending on the application, the appropriate measurement parameter should be selected.
• Dynamic range
  The sensor must be capable of reliably capturing both small and larger movements.
• Environmental conditions
  Temperature, humidity, or mechanical influences can affect measurement accuracy and should be considered.
• Mounting and location
  Sensor positioning is particularly important, as external influences can affect the measurement results.
• Long-term stability and drift
  For monitoring applications, stable sensor performance over long periods is crucial.

We are happy to support you in selecting the right sensor for your specific application. Contact us!