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Vaisala has extended its moisture in oil product range with the Vaisala HUMICAP® Moisture and Temperature Transmitter for Oil MMT162. This new transmitter offers a compact and economical solution for reliable continuous measurement of moisture in oil.

The MMT162 incorporates the latest generation of the Vaisala HUMICAP® Sensor. This sensor is developed for demanding moisture measurement in liquid hydrocarbons and has been used in oil applications for over a decade.

The MMT162 measures moisture in oil in terms of water activity (aw) and temperature (T). Water activity directly indicates whether there is a risk of free water formation. The measurement is independent of oil type, age, and temperature. In transformer applications ppm units are traditionally used. The ppm calculation for mineral oil based transformer oil is optional in the MMT162.

The MMT162 has two analog outputs that can be scaled and the measurement ranges changed. Additionally, the transmitter has an RS-485 serial output. An optional LED-cable enables a visual alarm.

Typical applications for the MMT162 are lubrication systems, hydraulic systems, and transformers. Its measurements can be used for on-line moisture monitoring and as a control function, allowing dryers and oil purifiers to be started only when necessary.