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Oil Quality Sensor Node (SD-OSN-2)

The Oil Quality Sensor Node is capable of reproducing the function of a traditional wired oil quality sensor in a much more convenient package which can be deployed and managed much more easily than wired sensors.

Oil Quality Sensor Node

One Sensor, Two Parts

Oil Quality Transducer

This is a traditional industrial oil quality transducer that would typically be hard-wired to a data collection box. Oil quality transducers output either a voltage or a current proportional to the oil quality their sensing element is exposed to. The oil quality transducer must be plumbed into the fluid system, and exposed to the working fluid, e.g. via a "T" fitting in a pipe.

Wireless Oil Quality Sensor Node

KCF's Oil Quality Sensor Node connects to the oil quality transducer via a short cable and uses a wireless link to replace the traditional wired path back to the data collection unit, eliminating the need to run cables to every point where oil quality is monitored. The wireless Node does not need to be exposed to the process fluid being measured. It can be mounted magnetically or with a threaded stud anywhere in the vicinity of the oil quality transducer as allowed by the short transducer cable

The SmartDiagnostics® Network

Oil Quality Sensor Node role in Smart Diagnostics Network


Oil Quality Sensor Nodes provide health monitoring in the most hard-to-reach, rugged locations. Each node communicates via a direct wireless link to a Base Station, from which the data is imported into SmartDiagnostics® Software for viewing and analysis.


The system is highly configurable and scalable. 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
  • Continuous monitoring of moisture and temperature
  • Expandable to hundreds of nodes per system
  • Allows wireless communication for instant results and efficient operation.
  • Robust industrial-grade design allows oil quality 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 oil quality transducer
Dimensions1.87 in diameter x 2.04 in height (47.5 mm x 51.8 mm) excluding antenna
Weight4.1 oz (115 g) not including transducer
Enclosure MaterialAnodized aluminum and high-strength polycarbonate
Connector Type8-pin 12x1mm threaded connector
Cable Length78 in (2 m)
Process FittingG ¾ Male
Environmental (Wireless Module)
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).
Repeater SD-R adds 2400ft (730m) of range.
AntennaSteerable antenna, providing 360° directional coverage.
Power Source3-Volt Lithium Manganese Dioxide (CR123A)
Battery LifeData acquisition every:
  • 1 hour – 4 months
  • 12 hours – 3 years
  • 1 day – 6 years
Note: battery life is somewhat reduced at extremely cold temperatures
Oil Quality Transducer
TypeOil moisture and temperature transducer
Range0 to 100% relative humidity / -4 °F to 238 °F (-20 to 120 °C)
Resolution1% relative humidity, 0.1 °C
Operating Temperature-40 to 185 °F (-40 to 85 °C) Typical
Temperature Sensor
Range-4 to 167 °F (-20 to 75 °C)
Resolution+/- 1 °F (+/- 0.5 °C)

Battery Life

The OSN is designed to be very energy efficient so that it can operate continuously for many years when powered by a 3.6 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

OSN Mechnical Drawing

Oil Quality Sensor Node Mechanical Drawing

OST Mechnical Drawing

Oil Quality Transducer Mechanical Drawing

Part NumberDescription
SD-OSN-2Oil quality sensor with flexible antenna
SD-OSN-2-AOil quality sensor with RP-SMA connector for tethered antenna

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.