Submersible vibration sensors

Submersible Vibration Sensors – Reliable Vibration Measurement Underwater and in Humid Environments

Submersible vibration sensors are specially designed devices for measuring vibrations and oscillations in wet, humid, or fully submerged environments. They are used wherever standard vibration sensors cannot operate due to water, moisture, or aggressive media.

These sensors are equipped with waterproof housings and specially sealed connections, enabling reliable condition monitoring of machines and equipment even under extreme environmental conditions. Typical application areas include pumps, turbines, water treatment plants, offshore applications, and maritime systems.

Submersible vibration sensors make a significant contribution to early fault detection and increasing system availability, especially in hard-to-access or safety-critical areas.

How Submersible Vibration Sensors Work

Submersible vibration sensors operate based on similar principles as conventional vibration sensors, but are specifically optimized for use in wet or submerged environments.

They are typically based on piezoelectric or MEMS-based sensing elements that convert mechanical vibrations into electrical signals. These signals are either output directly or processed internally.

Key features of these sensors include:

• Fully sealed housings (e.g., IP68 or higher)
• Pressure-resistant designs for underwater applications
• Special cables and connectors for use in humid environments

The sensors provide measurement parameters such as:

• Acceleration
• Vibration velocity
• Frequency response

This enables reliable analysis of machine condition—even underwater.

Typical Applications

Submersible vibration sensors are used in a wide range of demanding applications:

• Monitoring of pumps and pumping systems
• Water and wastewater technology
• Offshore and maritime applications
• Monitoring of turbines and generators
• Hydraulic systems
• Power generation (e.g., hydropower)
• Chemical and petrochemical plants
• Underwater installations and research

Advantages of Submersible Vibration Sensors

• Reliable measurement underwater
  Optimized for use in fully submerged applications.
• High protection rating and sealing
  Robust housings protect against water, moisture, and dirt.
• Corrosion-resistant materials
  Suitable for aggressive environments such as seawater or chemical media.
• Stable measurements even under harsh conditions
  Reliable signal quality despite pressure and humidity.
• Long-lasting and low-maintenance solution
  Ideal for hard-to-access or permanently installed systems.

How to Choose the Right Submersible Vibration Sensor

Selecting a suitable sensor requires a detailed assessment of environmental conditions and measurement requirements, especially for underwater applications.

• Protection rating and pressure resistance
  The sensor must be designed for the specific immersion depth and corresponding pressure. A high protection rating (e.g., IP68 or higher) is essential.
• Measured variable and frequency range
  Depending on the application, it should be determined whether acceleration or vibration velocity needs to be measured and which frequency range is relevant.
• Material and corrosion resistance
  For applications in seawater or aggressive media, special materials such as stainless steel or coated housings are required.
• Cables and sealing
  Cable connections must also be waterproof and suitable for the intended use, as they are often a weak point.
• Mounting and mechanical integration
  Secure and stable mounting is crucial for accurate measurement results, especially under dynamic conditions.
• Temperature and environmental conditions
  In addition to water, temperature, chemical influences, and mechanical stresses must also be considered.
• Signal processing and integration
  The sensor should be compatible with existing monitoring or data acquisition systems.

Our experts are happy to support you in selecting and integrating the right submersible vibration sensor for your application. Contact us!