Tan Delta Oil Quality Sensor (OQSx)

Tan Delta Oil Quality Sensor, highly flexible and cost-effective condition-based monitoring solution. Designed to be permanently mounted within any lubrication system and on any type of machine.

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CTH Industrial Controls can provide you with service and start-up assistance for Tan Delta Systems Limited.


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Over 60 times more sensitive to oil contamination than any other dielectric constant measuring sensor, the Tan Delta Oil Quality Sensor (OQSx) provides real-time monitoring of water ingress and oxidation levels.

Designed and developed to the highest standards, delivering accurate real-time monitoring of the condition of any lubricating oil. Based on a patented method, the Oil Quality Sensor (OQSx) gives you a true 360-degree view of how your oil is performing.

Ordering Codes: OQSx-1-AA-02-5-P, OQSx-1-AA-06-5-P


  • Proven Technology – A patented methodology that has been delivering value to customers for over 10 years.
  • Extremely Sensitive – Over 60 times more sensitive to oil contamination than other sensor technology, giving you the most accurate and detailed data available in real-time.
  • Robust and Reliable – Designed and built to withstand the harshest of industrial environments. Resistant to impacts, high temperatures, shocks, and vibrations.
  • Independently Tested – Rigorously tested by independent bodies to verify the outstanding performance in a wide variety of applications.
  • Fully Certified – Fully certified to international standards to work in the majority of commercial and industrial environments.