VW-NOTE Vibrating Wire

The VWnote is a handheld readout unit and datalogger which reads most commercially available geotechnical Vibrating Wire (VW) sensors and built-in thermistor temperature sensors. Readings are stored in its internal memory for transfer to a PC via a USB pen drive.

With a wide sweeping range of 450-6000 Hz, together with the ability to display and save results in engineering units as well as raw readings, the VWnote is very versatile.

The VWnote need never be connected to a PC; a USB pen drive is used to transfer the configuration file as well as saved readings between the VWnote and a PC. The internal memory card can store over 6 million sets of readings and the configuration parameters of several thousands of sensors.

Product Features 

  • Portable and rugged
  • Compatible with nearly all VW sensors
  • Realtime display of VW sensor readings in engineering units as well as in Hz, Hz2/1000 and period
  • Reading and displaying parameters can be fully configured for each sensor
  • Large data storage (2GB) and easy data retrieval via a USB pen drive
  • Firmware upgradable via USB pen drive by the user; no need for a PC
  • Long battery life; powered by a NiMH rechargeable battery
  • User selectable display backlight; auto shutdown

Product Benefits

  • Easy to carry and operate in all site conditions
  • Readings are accurate, repeatable and interference free
  • Taking readings is simple, fast and error free
  • Optional higher 15V excitation ensures quality readings for sensors with long cables
  • Site and sensor IDs facilitate management of VW sensors from one site or multiple sites
  • Saving readings in date groups and a large internal memory minimises data loss
  • Readings recorded and displayed in raw and engineering units
  • No site PC required to set up or download data; nor do users need to be computer literate to use VWnote
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The operation of VWnote is driven by the onboard menu. The main menu gives access to all VWnote functions, including:

  • READ – take a reading of the VW sensor currently connected to VWnote
  • SETUP – add sensors to the list of sensors or edit the sensors’ reading, displaying parameters and calibration factors
  • DATA TO USB – transfer data stored in VWnote internal memory to a USB pen drive
  • DATE/TIME – display and change the date and time of the real-time clock in VWnote
  • CFG EXPORT – copy the sensor list and configuration in VWnote to a USB pen drive
  • CFG IMPORT – copy a new sensor configuration file from a USB pen drive to VWnote
  • INFO – display information in VWnote, including serial number, firmware version, date, time, battery voltage and storage status.

All that is required is to switch on, connect a sensor or plug in a pen drive and follow the menu.



The VWnote can be used to read Vibrating Wire sensors for geotechnical and structural monitoring.

Typical applications include:

  • Pore pressure monitoring
  • Water level monitoring
  • Strain monitoring
  • Displacement monitoring
  • Crack monitoring
  • Load monitoring
  • Pressure cell monitoring