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Ground Vibration Measurement


The MENHIR (Modular Enhanced Intelligent Recorder) from Semex Engcon measures vibrations and shocks in an efficient and secure way. It makes complex tasks in structural dynamics, structural and vibration monitoring easy with customised solutions.

All of these areas require robust equipment with high-reliability recording, data transfer and analysis to handle high demands. MENHIR, in conjunction with the SDC software (Smart Data Center) specially developed for this purpose, guarantees secure collection, transmission and data analysis as a total solution.

MENHIR’s simple and intuitive operating concept allows anyone with minimal training to work successfully and quickly with the system.


Anytime. Anywhere.

The SDC Smart Data Center offers a fully integrated Cloud Solution to provide full access to your data and device status anytime, and, if desired, to the standard-compliant analysis of the data. Access your data quickly and easily from your PC, tablet or smartphone too. It requires no effort to set up access.

Scale according to your needs

Whether you manage only one measuring point or dozens, MENHIR makes it easy. The innovative cloud solution “Smart Data Center“ (SDC) Basic is included as an integral part of MENHIR system. An optional complete analysis module is also available providing a tool for effortlessly comparing to all common standards. Reports may be configured to your liking, automatically generated and transmitted electronically in free adjustable intervals.

Full flexibility

An internal SIM card slot available. The additional, external SIM card slot, allows you to determine at any time, without opening the device, which provider transmits your data. Your MENHIR may also be equipped with an optional, inexpensive M2M solution.

Full autonomy

No power at the job site? Never mind, MENHIR’s internal battery provides up to 48 hours operating autonomy, depending on transmission requirements.

Easy installation

The innovative measurement concept allows you to place the MENHIR with up to 15 ° offset on the ground. MENHIR detects the offset and corrects it automatically. You can also align the device exactly with the three, integrated levelling screws. No mounting platform is required.

Sensors & Downhole Sensors for MENHIR



External tri-axial or bi-axial (horizontal) velocity sensor (geophone) in compliance with DIN 45669.

  • Aluminium IP65 (Diameter: 100 mm, Height: 75 mm, Weight: 1.8 kg)
  • Cable length: 3m (default), others upon request
  • Output: analog, differential


External uni-axial (vertical) velocity sensor (geophone) in compliance with DIN 45669.

  • Aluminium IP65 (Diameter: 89 mm, Height: 70 mm, Weight: 1.0 kg)
  • Cable length: 5m (default), others upon request
  • Output: analog, differential

Downhole Sensors

Downhole Sensor

Tri-axial velocity sensor (geophone) in compliance with DIN 45669 for downhole applications.

  • Stainless steel IP68 (Diameter: 70 mm, Height: 200 mm, Weight: 3.5 kg)
  • Cable length upon request
  • Analog output, differential

Downhole Sensor clamping mechanism

The downhole sensor uses a movable eccentric disc mechanism for clamping the sensor towards the guidance (inclinometer) tube. This allows clamping and recovering the sensor at a specific depth.

The inclinometer tube must be correctly oriented (notch towards north) and solidly mounted (concrete) into the ground.

To see the product specification, please download the datasheet by clicking here

To download the datasheet click here

To download the brochure click here

To download a brochure on our “Smart Data Centre” software click here

To download a datasheet on dam monitoring click here