Monitoring moisture in oil
Moisture in transformers Q&A eBook
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.
Your key benefits for transformers
Real-time measurement of relative saturation (%RS) e.g. for dielectric strength monitoring
- Real Time PPM output for absolute moisture measurement in transformer oils
- Excellent long-term stability
- Highly selective to water molecules
- Insensitive to additives or contaminants in oil
Picture: Effect of relative moisture saturation (%RS) on dielectric strength of transformer insulation oils.
Your key benefits for lubrication
- Real time relative saturation measurement helps plan maintenance advance and minimize unplanned maintenance
- Real-time measurement helps minimize damage to critical machinery and also to optimize dryer usage
- Excellent long term stability ensures a trouble free operation and reliability of readings.
- Insensitive to additives and contaminants ensures suitability for numerous lubrication oil applications.
Get all the gains
Robust reliability
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.
Long-term stability
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.
Rapid Response
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.
Protect your machinery and minimize downtime
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.
Uniquely robust sensors
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.
What is water activity (aw)?
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.
Insights, webinars and more
Moisture in oil products
Moisture in oil probe MMP8
Moisture and Temperature Transmitter for Oil MMT162
Moisture and Temperature Meter Series MMT310
Intrinsically Safe Humidity and Temperature Transmitter Series HMT370EX
Power Industry Solutions
Contact us
Interested to receive more information on a specific application or product? Drop us a line, and we'll get back to you!
