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GeoWAN Temperature Sensor Node

  • Steel structures
  • Rail, for critical rail temperature alerting
  • Concrete structures, including during curing
  • Heating, Ventilation, and Air Conditioning (HVAC) systems
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The PT100 RTD Sensor Node allows for precision temperature monitoring using a variety of sensors. It uses the integrated radio transceiver to report its measurements through Senceive’s wireless communications network to a Gateway.

Key Benifits

  • Waterproof, robust connectors for simple installation
  • Accuracy of 0.1°C
  • Can have -IX triaxial tilt sensor integrated for combined tilt and temperature sensing in one unit
  • Integrated long life battery
  • 12-15 year battery life, including when acting as a relay node within the mesh communications network
  • Versatile mounting options
  • Waterproof to IP66 / IP67 / IP68
  • Firmware is remotely upgradeable over the air via the gateway reducing costly site visits


Channel Combination

Model Ports Applications
FM3N-RTD 1 PT100 RTD Channel Single point temperature monitoring
FM3N-IX-RTD 1 PT100 RTD Channel
1 Integrated high precision triaxial tilt sensor
Structural monitoring with precision temperature compensation
Railway deformation and critical rail temperature monitoring


Physical Specification

Parameter Value
Dimensions excluding antenna and vent 90 x 90 x 60 mm
Dimensions excluding antenna 90 x 96 x 60 mm
Total Mass 0.57kg
Housing Material Die cast aluminium
(BS EN 60529: 1992 + A2: 2013)
IP66 / IP67
IP68 at 1m for 24 hours
Mounting Options M4 blind holes in side
¼” UNF holes in bottom
Operating Temperature Range -40°C to +85°C


GeoWAN Radio Specifications

Parameter Value
* Consult with Senceive for your application
Communication Type Star Topology
Frequency Band 863MHz – 928MHz ISM Band
Maximum Transmit Power 20dBm (actual transmit power depends on geography)
Range Up to 15km depending on the environment and antenna*
Maximum Reporting Frequency 30 Seconds
Sample Storage Stores the latest 36 days of samples at a reporting interval of 30 minutes


RTD Interface

Parameter Value
Connector M12 Female
5-pole A-coded
Screw-in Type
Accuracy < 0.1°C
Resolution < 0.01°C
Temperature Range < -40°C to >85°C
Stimulus Type Constant Current


Tilt Sensor (-IX Variant Only)

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


Internal Battery

Parameter Value
Battery Type Lithium Thionyl Chloride
Nominal Voltage 3.6V
Nominal Capacity 19000mAh
Typical Battery Life 12-15 years at 20/30 minute reporting intervals, including when acting as a relay node
Consult with Senceive for your application




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