Measurement
Moisture-in-oil measurement for transformers and lubrication systems, for predictive maintenance and equipment protection.
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The definitive eBook on the subject, this companion to our renowned webinar series is full of the latest practical and scientific advice on measuring moisture in power transformers. Filled with your actual questions answered by Vaisala's experts, this nearly 40-page eBook is a versatile manual for anyone whose business it is to maintain guard against and understand the effects of moisture in power transformers.
Real-time measurement of relative saturation (%RS) e.g. for dielectric strength monitoring
Picture: Effect of relative moisture saturation (%RS) on dielectric strength of transformer insulation oils.
Accurate water saturation and PPM measurements in rapidly changing conditions. All equipment comes with NIST or Accredited calibration and is field calibratable. No moving parts in transmitters.
Thin film polymer sensor designs protect from contamination and are highly selective to water only . Capacitive technology provides long term stable measurement. Insensitive to additives or contaminants in oil. Auto-recovery from full saturation.
In situ, real time measurement of moisture in oil as true relative saturation (%RS). Eliminates need for sampling and lab analysis for moisture. Easy installation via ball valve. Installable even in energized transformers.
From power transformers to lubrication, and from maritime to pulp and paper Vaisala leads the leap into knowledge. With sensors built in our own cleanrooms, our robust technology offers long-term stable and precise measurements.
Download our eBook and get a full overview of moisture in oil.
Vaisala’s HUMICAP® were the first ever capacitive sensors used to measure moisture in oil online, and have since become a virtual industry standard.
The sensors have specifically been developed to measure even very low moisture levels in oils — mineral, vegetable and synthetic. The HUMICAP® sensors, manufactured in Vaisala’s own cleanrooms, have seen use in all corners of the Earth and even Mars.
Water activity is the amount of water in a substance relative to the total amount of water it can hold. It is defined in our application note, which you can read from the link below.
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