Defense Tech Briefs - Solid-State Viscosity Sensors For Military and Aerospace Applications

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Solid-State Viscosity Sensors For Military and Aerospace Applications

Vectron International, Hudson, New Hampshire

Jun 01 2007

Page 3 of 3

Figure 1: Viscosity Changes as a Function of Fuel Dilution across a temperature range using an acoustic wave viscosity sensor.

Before integrating these sensors, the company carried out an extended test of the sensors on an engine test stand. Commercially available oil was monitored for a baseline viscosity performance. Then, as the equipment was operated, specific percentage levels of fuel were introduced and the viscosity of oil was measured once again as a function of temperature. Figure 1 shows the difference in viscosity of the oil as a function of fuel dilution percentage levels across the temperature range. The test concluded that the end-user was able to make a series of decisions to ensure the continued functioning of the equipment with acoustic wave viscosity sensors.

Figure 2: Monitoring of Oil Condition as a function of use and temperature using an acoustic wave viscosity sensor.

Commercially available oil in new condition also was tested for a viscosity-versustemperature response. As the equipment was operated for several months, the viscosity of the oil was measured again as a function of temperature. Figure 2 shows the difference in the viscosity of the oil, which enables the end-user to make a series of decisions to ensure the continued functionality of the equipment.

Viscosity sensing is only one of the many ways that acoustic wave sensors have the potential to change the way companies do business, particularly in the mil/space industry. Their size, speed, and accuracy cut costs and save valuable time helping companies offer an unsurpassed level of performance to their customers.

This article was written by Kerem Durdag, Director of Business Development, Sensors & Advanced Packaging Business, for Vectron International in Hudson, NH. For more information, visit http:// info.hotims.com/10970-520.

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