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Vibration Sensor Node (SD-VSN-2)

The heart of the SmartDiagnostics® system, Vibration Sensor Nodes are at home in the most inaccessible, inhospitable corners of your facility, monitoring your machine health quickly and accurately.

vibration sensor node

What is new with VSN 2.0?

Vibration Sensor Nodes Version 2.0 have twice the range, higher sampling frequency, and are two and a half times more robust than before. The sensors can easily transmit a higher density of data using DARTwireless™, and can be powered with either a battery or an energy harvester. In a layout that can be configured for any plant or environment, as many as 100 sensor nodes can now send vibration data to each receiver. The sensors can be tuned to transmit data on the frequency you select, and monitoring bands can be customized to alarm levels that you choose, ready to caution or warn you immediately when frequency rises to a level you specify


SmartDiagnostics® can predict failure before it occurs, saving money spent on unnecessary replacements and extending machine life. At the same time, energy costs are reduced, as cleaner running machines are more efficient.


  • Cooling Towers
  • Pumping Stations
  • HVAC/R System Equipment
  • Paper & Metal Manufacturing
  • Power Plants
  • Food & Beverage Production Facilities


  • Accurately monitors vibration and temperature in a variety of locations.
  • Allows wireless communication for instant results and efficient operation.
  • Robust industrial-grade design allows vibration sensor nodes to be reliably used in harsh industrial environments.
  • Very easy installation – no wires, no tools – locate, place and go.
  • Requires no batteries – extremely low power operation enables use with energy harvesters.

The SmartDiagnostics® System

Vibration Sensor Node role in Smart Diagnostics System
Dimensions41.1mm diameter x 50.5mm height (1.62in x 1.99in) Excluding antenna
Weight115g (4.1oz)
  • 2.40GHz ISM band radio (FCC ID #Z5ISD2)
  • 2Mbps over the air data rate
  • Frequency agility interference mitigation
  • Dynamic packet error recovery
  • Flexible antenna, 90° in any directions
  • Optional SMA antenna adapter
  • Impact resistant
  • Steerable
Power Source
  • 3 Volt lithium (CR123A or equivalent), or
  • One of KCF’s line of energy harvesters
Battery LifeFull spectrum acquisition every:
  • 60 minutes (24 per day)-- 10 years
  • 15 minutes (~100 per day)-- 5 years
  • 2.5 minutes (~500 per day)-- 2 years
Enclosure MaterialAluminum and polycarbonate enclosure
Measurement Range+/- 16 g
Measurement Resolution0.013 g
Bandwidth Frequency Range0-4096 Hz (Max sampling frequency 8192 Hz)
Spectral Resolution800 spectral lines
Temperature Measurement Range-40° to 70°C
Temperature Accuracy+/- 0.5°C with proper calibration
Mounting Options
  • Internal 15 lb pull strength magnet
  • Screw mount 1/4in-28 internal threaded hole in base.
  • Any standard adapter that fits into the threaded hole
Environmental Testing-40° to 70°C storage & operating, IP65 enclosure, 5ft drop on concrete surface

Battery Life

The VSN is designed to be very energy efficient so that it can operate continuously for many years when powered by a 3.6 Volt battery or virtually indefinitely on a harvester.

The actual amount of power consumed (and therefore the effective battery life) is dictated by two factors:

  1. The frequency at which the sensor sends a heartbeat ping to the PRN, and
  2. The frequency at which the sensor collects and transmits vibration data to the PRN.

The heartbeat ping takes very little energy so the primary driver of battery life is governed by the vibration data collection frequency which you configure based on your business needs. The graph below illustrates how battery life varies with changes to collection frequency assuming the sensor heartbeats every four seconds.

battery life graph

Battery Life vs. Vibration Data Collection Frequency

VSN Mechnical Drawing

Vibration Sensor Node Mechanical Drawing

Federal Communications Commission Compliance ‒ FCC Class B Device Statement The radio equipment in the SmartDiagnostics Receiver Nodes and SmartDiagnostics Sensor Nodes has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. Hazardous Location Information ‒ The SmartDiagnostics Vibration Sensor Node model SD-VSN-2N is certified to be suitable for use in Class I, Division 2, Groups A,B,C,D or non-hazardous locations only.

SmartDiagnostics® Gives Your Machines a Voice.