Millivolt Sensor Node

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*COMPATIBLE WITH BOTH FLATMESH™ AND GEOWAN™ SYSTEMS*

The Millivolt Sensor Node brings a wide variety of resistive bridge sensors into our system. It uses the integrated radio transceiver to report its measurements through Senceive’s wireless communications network to a Gateway.

Examples of the sensors supported:

  • Pressure sensors (differential, absolute)
  • Foil strain gauges
  • Torque sensors
  • Load cells
  • Load pins
  • Moisture sensing
  • Conductivity

Key benefits

  • Waterproof, robust connectors for simple installation
  • Regulated sensor stimulus
  • 24-bit sensing performance
  • 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

Physical specifications

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
Protection
(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
Operating Temperature Range -40°C to +85°C

FlatMesh Radio Specifications

Parameter Value
* Consult with Senceive for your application
Communication Type Proprietary FlatMesh v3 Mesh Networking Protocols
IEEE 802.15.4 compliant
Frequency Band 2400 – 2485 MHz ISM Band
Maximum Transmit Power
(EN 300 328 v1.8.1)
6.5dBm
Maximum Permitted Antenna Gain 2.2dBi
Range Up to 300m depending on the environment and fitted antenna *
RF Module Senceive FM3Node

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

Millivolt Sensor Interface

Parameter Value
Connector M12 Female
5-pole A-coded
Screw-in Type
Range ±0.625V (±125mV/V)
Resolution 74.5nV (14.9nV/V)
Repeatability ±2.5μV (±0.5μV/V)
Stimulus 5.0 ± 0.1V
150mA max

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 12-15 years at 20/30 minute reporting intervals, including when acting as a relay node
Assumes a resistive bridge load of 350Ω *

Certifications

  • Tested to conformity with all the essential requirements of RED Directive 2014/53/EU and RoHS Directive 2011/65/EU
  • FCC Grant of Equipment Authorization: FCC ID 2AMFBFM3N

Ordering Information and Accessories

Model Description
FM3N-MV5
LR3N-MV5
FlatMesh 3 5V mV/V Sensor Node
GeoWAN 5V mV/V Sensor Node
FS-MV5CON Sensor Connector
With screw terminals for easy installation
FF-MP-S360 Swivel mounting kit with 360-degree adjustment range
FF-MP-V Vertical mounting plate
Use with FF-MP-S360
FF-MP-H Horizontal mounting plate
FF-MP-HM Horizontal magnetic mounting plate
FF-MP-RA Right angle mounting bracket
Use with FF-MP-S360
FF-MP-T2 Track bed mounting plate kit
FF-MP-M2 Magnetic mounting kit
High degree of adjustability, perfect for cast iron lined tunnels
FA-FM-WPS Waterproof straight antenna
Overall node height 168mm (approx.) when fitted
Maximum gain +1.1dBi
FA-FM-LPS Waterproof low profile straight antenna
Minimum overall node height, perfect for track bed and tight spots
Overall node height 92mm (approx.) when fitted
Maximum gain 0dBi
FA-FM-ADJ Adjustable angle antenna
Flexible installation, perfect for use in tunnels and indoor environments
Overall node height 202mm (approx.) when upright
Overall node height 102mm (approx.) when at 90-degree angle
Maximum gain +2dBi
FC-NC Antenna cover kit
Use with FA-FM-LPS antenna
Overall node height 96mm (approx.) when fitted