Specifications for EarthSub Ground Movement Sensor

/Technical Specifications
Technical Specifications2018-07-13T10:43:15+10:00
ground movement sensor specifications
  • 64 Sensors per standard site controller (optional up to 255)

  • Sensor Sensitivity from .01 mm to  10 meter lateral movement

  • Sensor sensitivity from .1 degree to 360 degree pitch, yaw or roll

  • IP68 fully submersible sensor and IP65 site controller

  • Operating temperature range from -20C to 80C

  • Multiple and mixed connectivity via coaxial fire resistant cable, fibre optic cable, UHF radio and satellite

  • Ultra low voltage 3.3V and fully solar powered with battery backup

  • Zero EMF footprint from sensor and site controller


Sensor Sensitivity .01mm – 2000mm lateral movement; .1 degree rotation
Sensor Dimensions L x W x H 150mm x 150mm x 115mm
Sensor Weight 1.9Kgs
Site Controller Dimensions L x W x H 320mm x 360mm x 130mm
Site Controller Weight 22.5Kgs
Site Controller Connectivity 64 sensors standard (optional 255 max.)
How “failsafe” is EarthSub?2017-05-08T12:17:23+10:00

The product is constructed to military standards and utilizes the highest grade electronics. However, the best technology can experience mechanical and electrical failure.

In light of the critical; early warning role in detection of landslides, washouts and structural health monitoring, EarthSub has a number of levels of “heartbeat” to ensure it’s connectivity and functional state. If a sensor loses contact with a site controller an alarm is triggered. If a site controller loses contact with the server software applications a further alarm is initiated to allow service personnel to check the installation.

To offset any data communications failure, the site controller is capable of triggering an analogue alarm that can be observed by passing maintenance or field personnel.

It is as close to a failsafe early warning system as is possible.

How rugged is EarthSub?2017-05-05T18:11:37+10:00

The hardware is designed to provide extreme rugged performance in remote deployments. The sensors are IP68 rated and can be fully submerged for aquatic monitoring of dam walls, harbour foreshore structures and oil drilling platforms etc. The sensor housing has been tested to over 1,000 tonnes of pressure and will operate in temperatures between -20C and 80C.

The site controller is IP65 and has similar temperature ratings and is of the same material strength. Cables where used, are industrial grade and can be fire resistant if required.

What are the components of an EarthSub configuration?2017-05-05T17:37:59+10:00

The core components of an EarthSub installation are a sensor to detect and report ground movements. A hub to provide power to the sensors and provide telemetry to a site controller. The site controller interprets data from the sensor and determines if an alarm needs to be triggered or data on a ground movement needs to be logged. The site controller then forwards data to the EarthSub Administration Software Suite for display and warning processing.

A basic configuration would be an EarthSub sensor, a site controller and a coaxial cable to connect the two items. A typical field configuration would be a number of sensors being connected by a cable to a hub (8 sensors max per hub) and the hubs connecting to a site controller by UHF radio or fibre optic cable.

Both the hub and the site controller are (typically) powered by a solar panel with battery for backup. The site controller then communicates with a cloud server or a customer’s own network for interaction with the software suite.

How is EarthSub connected to the Monitoring Software Suite?2017-05-05T13:36:25+10:00

There are many communication options within the EarthSub solution.  Individual sensors can direct connect to a site controller via a fireproof coaxial cable.  One or more sensors can connect to a hub via cable and the hub connects to the site controller via fibre optic cable or uhf radio..  For truly remote installations; for example the middle of a desert, a hub can connect via satellite to a site controller.

The site controller then passes data to the relevant software via direct ethernet connectivity, 3G/4G device, SMS interface or any IP protocol technology.

What direction of ground movement can EarthSub detect?2017-05-05T13:34:44+10:00

The EarthSub sensor can detect ground movement distance in millimeters; forward, backwards, left, right, up, down and can detect rotational movement for pitch, roll and yaw in degrees.