MMP8
HUMICAP® moisture-in-oil probe for transformers and lubricants
A probe for continuous measurement of dissolved moisture and temperature in oil, featuring the HUMICAP® 180L2 sensor developed for transformer oils, lubricants and hydraulic fluids. It measures water activity and relative saturation — the real margin to free-water formation, independent of oil type and age — and can output ppm concentration for known oils such as mineral transformer oil.
Download datasheet (PDF)Technical specifications
- Water activity
- 0–1 aw / 0–100 %RS (exactitud hasta ±0,01 aw / ±1 %RS; sensor HUMICAP® 180L2)
- Water concentration
- ppm de agua en aceite (exactitud típica 10 % de la lectura; conversión disponible para aceite mineral de transformador)
- Temperature
- -40 °C a +180 °C en el cabezal de la sonda (exactitud ±0,2 °C)
- Operating pressure
- 0–40 bar absolutos (instalación hasta 10 bar; kit de válvula esférica opcional)
- Outputs
- Modbus RTU sobre RS-485; %RS, temperatura, aw y ppm
- Materials and rating
- Sonda y cuerpo AISI 316L; IP66; certificación DNV GL (modelo de 262 mm)
Key features
- Latest-generation HUMICAP® 180L2 sensor with excellent dry-end sensitivity
- Measurement independent of oil type and age
- Water activity and relative saturation directly indicate the risk of free-water formation
- ppm output with factory conversion for mineral transformer oil
- Two probe lengths (262 and 448 mm) with adjustable installation depth
- Install and remove while the process is running, using the ball valve kit
- Traceable factory calibration certificate
- Compatible with the Vaisala Indigo family and Insight PC software
Typical applications
- Power transformer condition monitoring
- Lubrication oils — water ingress detection
- Hydraulic fluids and oil circulation systems
- Preventing free-water formation in machinery
- Integration into monitoring platforms with Indigo transmitters
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