Oil Condition Monitoring Sensor
Oil Condition Monitoring Sensor

Oil Condition Sensor


Fine and coarse particle contamination is a major cause of breakdowns in hydraulic and lubrication oil systems; therefore continuous real-time oil debris monitoring plays a crucial role in developing a predictive maintenance strategy.

The 4212 Oil Condition Sensor offers 4 types of measurement outputs and with no specialist knowledge required to analyse the outputs, the sensor offers a low cost of ownership. It allows the end user to identify and thereby eliminate an unplanned breakdown; the oil condition sensor gives a quick and positive return-on-investment.

17 New thread adapters now available :

  • M22 x 1.5
  •  M26 x 1.5
  •  M42 x 2.0
  • M24 x 2.0
  •  M27 x 2.0
  •  1 1/2” BSPP
  • 3/4” x 16 UNF
  •  M30 x 1.5
  •  1” BSPP
  • 1/2” BSPP
  •  3/4” BSPP
  •  1 1/8” 12 UNF
  • M20 x 1.5
  •  1” 14 UNF
  •  1 5/16” 12 UNF
  • M25 x 1.5
  •  1” 18 UNF

The Oil Condition Sensor has been developed to assist the plant or automotive engineer to improve the reliability of their equipment. By continuously monitoring the most common causes of gearbox and transmission failure, the sensor provides early indications of a potential problem allowing for planned investigation and remedial action to be implemented before catastrophic failure occurs.

Powerful magnets attract and retain ferrous particles in the fluid. Identification is either fine wear particles signalling fluid cleanliness or increased wear rates, or coarse failure pieces giving early indication of possible component failure.

Additionally, the sensor will provide an alarm condition of water contamination in oil, which can lead to subsequent part failure and an oil presence alarm, signalling either low oil levels or leakage.

Available with either 0-10V, 4-20mA or CAN outputs, along with a local visual alarm option, the sensors are designed to suit most data collection devices such as Dataloggers, PLC’s, ECU’s. The sensor features a simple metric thread with an O-ring seal for direct fitting into a gearbox or transmission housing.


Oil Condition Monitoring Sensor
Oil Condition Monitoring Sensor
  • Captures fine wear & coarse failure ferrous particles.
  • Water in oil contamination detection.
  • Oil temperature or oil presence measurement.
  • Reduce unplanned downtime.
  • In-line electronics.

    Oil Condition Monitoring Sensor
    Oil Condition Monitoring Sensor


Output : Voltage 0-10V, 4-20mA, CAN J1939
Report Rate : Voltage, 4-20mA 10Hz
Analogue Resolution: 10 bit
Supply Voltage : Voltage +6 to +32 V DC
4-20mA +9 to +32V DC
CAN +5 to +32 V DC
Power Consumption : Voltage <0.7W
4-20mA <2.6W
CAN <0.7W
Operating Temperature : Sensor -40° to +150°C
Enclosure -40° to +125°C
Ingress Protection : Sensor IP66 / IP68 / IP69K
Enclosure IP66 / IP68 / IP69K
Size : Sensor 57 x Ø24.5mm
Enclosure 55 x 30 x 12mm
Compatibility : Fuel, Oil, Coolant, Saltwater (see datasheet for more detail)

Continuous, multi-function oil condition sensing.

  • 4 oil condition measurement parameters.
  • Captures and retains ferrous debris.
  • Continuous real-time monitoring.
  • Easy installation.
  • Low cost of ownership.
  • 4-20mA, 0-10v & CAN outputs.


Item Voltage 4-20mA
Channel 1 (fine) 0.25 – 10V DC (configurable) 4mA – 20mA (configurable)
Channel 2 (coarse) 0.25 – 10V DC (configurable) 4mA – 20mA (configurable)
Channel 3 (oil/temp) (switched) 0.25 – 10V DC (configurable) 4mA – 20mA (configurable)
Error indication <0.25 – 10V DC (configurable) 1mA – 20mA (configurable)


J1939 data length 8 bytes
PGN 130816
Byte 0 Coarse measurement percentage, no scaling Value 255 – optional output inhibited during calibration
Byte 1 Fine measurement percentage, no scaling Value 255 – optional output inhibited during calibration
Byte 2 8 Status bits
Bit 0 – High/low temperature exceeded
Bit 1 – Oil upper threshold exceeded
Bit 2 – Oil lower threshold exceeded
Bit 3 – Fine measurement error
Bit 4 – Coarse measurement error
Bit 5 – Oil measurement error
Bit 6 – Internal temperature sensor error
Bit 7 – External temperature sensor error
Byte 3-7 Manufacturer use


Item Voltage  4-20mA CAN
Supply voltage 6 – 32V DC 9 – 32V DC 5 – 32V DC
Over voltage protection >32V DC
Power consumption <0.7W <2.6W <0.7W
Reverse polarity protection to -32V DC
Analogue resolution 10 bit
Report rate 10Hz 10Hz 1Hz
Sensor configuration Accessible via USB


Sensor Size 57 x ø24.5mm
Enclosure 55 x 30 x 12mm
Enclosure mounting 2 off M4 clearance holes
Materials (sensor) Aluminium alloy, FEP, PEI
Materials (enclosure) Aluminium alloy, st/steel, polyester


Fuels Diesel, gasoline
Oils Hydraulic, gear, mineral, vegetable, synthetic ester,
semi-synthetic, polyalphaolefin, polyalkyleneglycol
Coolants Ethylene glycol, Water
Other Salt water


Sensor protection IP66 / IP68 / IP69k
Enclosure protection IP66 / IP68 / IP69k
Differential pressure 10 Bar
Sensor operating
-40° to +150°C
Enclosure operating
-40° to +125°C
Humidity 95% RH @ +55°C

Oil Condition Sensor Ordering

Oil Condition Sensor Ordering
Oil Condition Sensor Ordering


Oil Condition Sensor Dimension
Oil Condition Sensor Dimension


Oil Condition Sensor Mounting Threads
Oil Condition Sensor Mounting Threads


Wiring Designation
Wiring Designation


Read more : Liquid Level Sensor For Boat Fuel; Water Level Sensor For Marine; Water Tank Level Sending Unit For Boat Fuel; Water Utilities Level Sensor For Marine; Viscous Liquids Level Sensor For Marine; Blackwater Level Sensor; Lightweight Liquid Level Sensor


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