FlatMesh 3 Optical Displacement Node

  • Convergence/divergence for Tunnel/Arch intrados or bridge abutments
  • Vertical movements for structural settlement/heave
  • Lateral movements such as rail track slew
  • Earthworks and embankment movement
  • Water level monitoring / Dewatering
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The Optical Displacement Sensor Node is an instrument which uses optical means to take high precision displacement measurements and pass these through Senceive’s wireless communications network to a Gateway.

It can also be combined with Senceive’s world-leading triaxial tilt sensor to obtain high precision tilt measurements that are linked to an external reference.

Key Benifits

  • Fully integrated unit
  • Extremely low noise performance
  • Optical sensor resolution of 0.1mm and repeatability of ± 0.15mm
  • Triaxial tilt sensor resolution of 0.0001° (0.0018mm/m) and repeatability of ±0.0005° (±0.009mm/m)
  • Integrated long life battery
  • 10 years battery life, including when acting as a relay node within the mesh communications network
  • Easy to align with target when using the magnet triggered aiming mode
  • Integrated temperature sensor
  • Versatile mounting options
  • Waterproof to IP66 / IP67 / IP68
  • Firmware is remotely upgradeable over the air via the gateway reducing costly site visits


Physical Specifications

Parameter Value
Dimensions excluding antenna 90 x 90 x 60 mm
90 x 96 x 60 mm (including vent)
Total Mass 0.6 kg (approx.)
Housing Material Die cast aluminium

(BS EN 60529: 1992 + A2: 2013)

IP66 / IP67
IP68 at 1m for 24 hours
Mounting Options Clearance holes for M4 socket head screw in bottom, M4 blind holes in side
Plates and brackets available for magnetic fixing, track bed, stake and pole mounting, and many other applications
Operating Temperature Range -10°C to +50°C (full functionality)
-25°C to +70°C (mesh radio, temperature and tilt)

FlatMesh Radio Specifications

Parameter Value
* Consult with Senceive for your application
Communication Type Proprietary FlatMesh v3 Mesh Networking
IEEE 802.15.4 compliant
Frequency Band 2400 – 2485 MHz ISM Band
Maximum Transmit Power (EN 300 328 v2.1.1) 6.5dBm
Maximum Permitted Antenna Gain 2.2dBi
Range Up to 300m depending on the environment *
RF Module Senceive FM3Node

Optical Sensor Specifications

Parameter Value
Resolution 0.1mm
Repeatability ±0.15mm
Range 50 metres (natural surface)
100 metres (white target)
150 metres (reflecting target)
Laser Type Class 2, 655nm (visible red)

Tilt Sensor Specifications (-IX Version)

Parameter Value
Resolution 0.0001° (0.00175mm/m)
Repeatability ±0.0005° (±0.0087mm/m)
Range ±90°

Internal Battery

Parameter Value
* Consult with Senceive for your application
Battery Type Lithium Thionyl Chloride
Nominal Voltage 3.6V
Nominal Capacity 19000mAh
Typical Battery Life 10 years at 1 hour reporting interval, including when acting as a relay node
8 years at 30 minute reporting interval, including when acting as a relay node
Battery life may be reduced when measuring to poorly reflecting surfaces *




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