Jet-Care US Laboratory is awarded American Bureau of Shipping (ABS) Service Supplier status.

Find out more in the News section.

Spectro | Jet-Care launch new sample kits for marine customers

Find out more in the News section and on the Marine Sample Kits page.

Spectro | Jet-Care confirm compliance with new hydraulic fluid sampling requirements of Airbus OIT

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Spectro | Jet-Care Updates regarding Coronavirus (COVID-19)

All our laboratories remain open - please read the latest information in the News Section of our website.


With decades of experience in industrial markets, we understand the rigorous standards required and the time pressures you face. Our comprehensive range of services, including oil, hydraulic fluid, fuel, transformer, silicon, coolant and gas analysis, are tailored to your specific requirements so you always have the resources available when you most need them.

Dielectric Breakdown Voltage

The dielectric strength of a transformer oil is defined as the maximum voltage that can be applied across the fluid without electrical breakdown.  Transformer oils are designed to provide electrical insulation under high electrical currents therefore any significant reduction in the dielectric strength may indicate that the oil is no longer able to function in this capacity.  The sample is carefully poured into a clean test vessel containing specific electrodes and placed in the test equipment.  A voltage is applied across the sample starting at zero and increasing until breakdown occurs.  The breakdown voltage is reported in kV.