Datasheet MOP301

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Features

The moisture in oil can be expressed in absolute or relative terms.

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Water activity aw is the relative measure for moisture in oil. It represents the ratio between the actual amount of

dissolved water and the maximum possible amount of dissolved water in the oil at a certain temperature. Independently

of the oil type, the water activity shows how close to saturation the oil is at any moment in time. aw = 0 indicates

completely dry oil, while aw = 1 fully saturated oil. MOP301 measures the water activity directly.

▪ The

water content x is an absolute measure for the amount of water in the oil (dissolved, emulsified or separated).

The water content is usually expressed in ppm or mg water/kg oil and it is independent from the oil temperature. For

assessing the degree of saturation, x must be regarded together with T. MOP301 calculates x based on the measured

aw and T values. The calculation is oil dependent and requires a set of oil specific parameters. E+E offers the service of

determining the oil specific parameters, see section “Ordering Guide” below. The parameters can be set upon order or

uploaded to MOP301 using the PCS10 Product Configuration Software.

Measurement of water activity aw / water content x

In certain applications, the oil can become corrosive over time, for example due to continuous contamination of lubricating

oils by salt water in the maritime environment. In such demanding applications, the E+E proprietary protection of the

sensing element leads can significantly extend the service life of the sensor.

Sensor Leads Protection

The MOP301 is compatible with the Sigma 05 host device of the E+E Modular Sensor Platform. Together they become a

versatile, plug-and-play aw / x modular sensor with analogue outputs and optional display. Besides MOP301,

Sigma 05 accommodates also other E+E intelligent sensing probes. See www.epluse.com/sigma05 for further details.

Sigma 05 with MOP301

E+E Modular Sensor Platform