Electronic Vehicle Controls - Sensors - Oil Quality Sensors


TANDELTA Oil Quality Sensor with CAN networking



OQSx-G2 is an advanced real-time oil condition sensor delivering unique insight into the status of your equipment, enabling significant operating cost reductions through maintenance optimization, advanced fault detection and reduced waste.

OQSx-G2 is powered by proprietary FSH™ core technology which combines real time oil condition analysis with data analytics. The electro-chemical properties of oil are continuously analyzed to an accuracy of 0.001% generating high quality raw data, which is then processed using our advanced analytics. This enables OQSx-G2 to accurately detect and measure all wear, contamination and failure modes and reliably inform you when equipment requires maintenance.

OQSx-G2 can be easily installed on any equipment, operating in any environment, with any oil type.


  • FULL SPECTRUM HOLISTIC (FSH™) Unique capability to detect and measure all and any wear and contamination - water, acid, fuel, viscosity, different oil types, carbon, particles etc.
  • ANALYSIS ACCURACY FSH technology analysis, detects and measures changes in the electro-chemical properties of live oil in real time down to 0.001% (10ppm) change sensitivity. Unmatched raw data quality.
  • REAL-TIME Continuously analyzes and reports oil condition on operating equipment and reports oil condition every seconds.
  • ROBUST and RELIABLE Proven around the world for use in even the most extreme industrial and commercial applications.
  • EASY TO INSTALL Quick and easy to install on any equipment with plug and play integration with any existing data reporting and display systems.


Tan Delta advanced oil condition monitoring provides a new level of equipment condition insight resulting in reduced operating and ownership costs through a combination of optimized maintenance scheduling, advanced fault detection, longer equipment life, and reduced waste.

  • MAINTENANCE OPTIMIZATION Eliminate unnecessary time based maintenance, through optimized maintenance scheduling according to actual equipment need and maintenance condition.
  • ADVANCED FAULT DETECTION Detect early signs of issues before equipment damage to enable pre-emptive maintenance and reduce breakdowns.
  • ENVIRONMENTAL (ESG) Reduce waste, extend equipment life, increase equipment productivity and efficiency. Reduce carbon footprint.
Product Information
  • Gen 2 oil quality sensor
  • OQSxG2-1-CC-10-5 #10 ORB SAE J1926-3 (7/8-14 UNF)
  • OQSxG2-1-EE-06-5 1/2 in NPT
  • OQSxG2-1-DD-02-5 1/2 in BSPP
  • Stainless steel AISI304
  • 102 x 36 mm (4 x 1.42 in)
  • 180 g (0.4 lb)
  • 32 mm AF hex collar
Installation torque:
  • 25 N-m (18.4 ft-lb)
Available Threads
  • SAE #10 ORB (7/8-14 UNF) Seal: O-ring (VITON)
  • 1/2 in BSP Seal: Dowty type (VITON)
  • 1/2 in NPT
Connector type:
  • 6 pin Bulgin 4000 series
Supply voltage:
  • +9 to 30 Vdc
  • 0.4 W average
Data Input/Output
Digital Output:
  • RS-485
  • CANbus
Supported protocols:
  • Modbus
  • CANOpen
  • SAE J1939
Analog Output
Oil temperature:
  • 4 to 20 mA
Oil condition:
  • 4 to 20 mA
Oil Quality Detection Parameters
Measurement frequency:
  • 2 sec
  • Tan Delta number (TDN)
  • Oil temperature (°C or °F)
  • 0.001%
  • ±0.5%
  • All wear and contamination
Oil Type
  • Any mineral, semi-synthetic or synthetic oil, including fuels (diesel and bio-diesel)
Operating temperature:
  • -40 to 120 °C (-40 to 248 °F)
Calibrated temperature:
  • -20 to 120 °C (-4 to 248 °F)
Fluid temperature:
  • -40 to 120 °C (-40 to 248 °F)
Storage temperature:
  • -55 to 150 °C (-67 to 302 °F)
Fluid pressure:
  • up to 70 bar (1015 psi)
Standards and Certification
Ingress protection:
  • IP68 (when connected)
Shock and vibration:
  • BS EN 60068-2-30 (Test Db - Cyc.Hum.)
  • BS EN 60068-2-6 (Test Fc - Sine Vib.)
  • BS EN 60068-2-27 (Test Ea - Mech. Shock)
  • EN 61000-6-4:2007 (Generic Emissions Standard for Industrial Environments)
  • EN 61000-6-2:2005 (Generic Immunity Standard for Industrial Environments)
  • CE Marked
  • RoHS Compliant

1/2 in NPT: Part No. 4003034

SAE #10 ORB (7/8-14 UNF): Part No. 4003035

1/2 in BSPP: Part No. 4003036

Configuration software and cable kit: Part No. 4214450