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General Input Sensor Node (SD-IN-2)

The General Input Sensors allow connection to existing diagnostic voltage or current output signals, creating a wireless solution for health monitoring in the most hard-to-reach, rugged locations.

General Input Sensor

What's New In Version 2?

Version 2.0 sensor nodes 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 are powered by a standard CR123A camera battery. 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.

The SmartDiagnostics® Network

General Input Sensor Node role in Smart Diagnostics Network


General Input Nodes allow connection to existing diagnostic voltage or current output signals, creating a wireless solution for health monitoring in the most hard-to-reach, rugged locations. Each node communicates via a direct wireless link to a Primary Receiver Node, from which the data is imported into SmartDiagnostics® Software for viewing and analysis.


The system is highly configurable and scalable and KCF can provide transducers to meet a wide array of applications. A system can have hundreds of sensor points, each of which can be configured to transmit data on a user-selected frequency, and unique indicators can be implemented to warn users of potential machine health issues.


Easily installed without the downtime, expense, and labor costs of old-fashioned, hard-wired sensors. Simply place the sensors where you need them and within minutes they’ll transmit data. 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 properly maintained machines are more efficient.


  • Optimized for long battery life
  • Customizable sampling regimes
  • Flexible transducer options
  • Expandable to hundreds of nodes per system
  • Allows wireless communication for instant results and efficient operation.
  • Robust industrial-grade design allows general input sensor nodes to be reliably used in harsh industrial environments.
  • Very easy installation – no wires, no tools – locate, place and go.


  • Cooling Towers
  • Pumping Stations
  • HVAC/R System Equipment
  • Paper & Metal Manufacturing
  • Power Plants
  • Food & Beverage Production Facilities
ConfigurationWireless node with cable whip to customer-supplied voltage or current signal source
Weight4.1 oz (115 g)
Enclosure MaterialAnodized aluminum and high-strength polycarbonate
Connector TypeCustomizable - contact KCF with requirements
Cable LengthCustomizable - contact KCF with requirements
Storage Temperature-40 to 238 °F (-40 to 120 °C)
Min. Operating Temp.-4 °F (-20 °C)
Max. Operating Temp.230 °F (110 °C) surface @ 72 °F (22 °C) ambient
212 °F (100 °C) surface @ 105 °F (40 °C) ambient
167 °F (75 °C) surface @ 167 °F (75 °C) ambient
IP RatingIP65, dust-tight and impervious to water jets
Impact ResistanceSurvives 5-ft drop onto concrete surface
Wireless Radio
RadioKCF DART Wireless 2.4GHz ISM band, FCC ID #Z5ISD2
Range800ft (244m) line-of-sight (site survey recommended for installation)
AntennaSteerable antenna, providing 360° directional coverage.
Power Source3-Volt Lithium Manganese Dioxide (CR123A)
Battery LifeData acquisition every:
  • 13 seconds – 1 year
  • 40 seconds – 3 years
  • 65 seconds – 5 years
Note: battery life is somewhat reduced at extremely cold temperatures
Electrical Input
TypeVoltage or Current input
Range0-11 VDC (SD-VIN-2)
0-20 mA (SD-CIN-2)
Resolution0.03% of full scale
Noise Floor0.05% of full scale
Samples per Acquisition32-1600 configurable
Sampling frequency64 Hz – 8192 Hz configurable
Operating Temperature-40 to 185 °F (-40 to 85 °C) Typical

Battery Life

The General Input Sensor Node is designed to be very energy efficient so that it can operate continuously for many years when powered by a 3 Volt battery.

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 Base Station, and
  2. The frequency at which the sensor collects and transmits data to the Base Station.

The heartbeat ping takes very little energy so the primary driver of battery life is governed by the 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

Sensor Node Mechnical Drawing

General Input Sensor Node Mechanical Drawing

Part NumberDescription
SD-CIN-2Current-input sensor, for interfacing with 4-20 mA signals
SD-VIN-2-AVoltage-input sensor, for interfacing with DC voltage signal

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.