Water Activity Measurement

The measurement of water activity or equilibrium relative humidity (ERH) is a key parameter in the quality control of moisture sensitive products or materials.

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Water Activity Probes

Rotronic Measurement Solutions

Water activity – a measure for the energy status of the water in a system’ specifies the relationship between the water vapour pressure of a product and the saturation pressure of pure water at the same temperature. It is stated in ‘aw’ in the range 0…1 aw and is an important indicator for product quality in the industrial production of, for example, plastics. The determination of water activity is also very important in the food, tobacco, pharmaceutical and cosmetics industries. Water activity should not be confused with the water content – the ‘chemically bound’ water – of a product.

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Insertion Probes for Water Activity Measurement

Rotronic Measurement Solutions

The Insertion Probe is the part of the Inspection Camera that is inserted into the machinery in question. Also called an Insertion Tube, Insertion Probes are often subjected to deterioration and wear-and-tear from the inhospitable environments found inside industrial machines. Insertion Tubes can contain data cables, articulation cables, and sometimes even a Working Channel. Tungsten, Stainless Steel, and Polyethylene are the three most common materials used to coat Insertion Probes to make them crack resistant, puncture resistant, and even heat resistant.

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Laboratory Analyzer for Water Activity Measurement

Rotronic Measurement Solutions

High- End laboratory instruments to offer precise measurements

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Handheld Instrument for Water Activity Measurement

Rotronic Measurement Solutions

In many situations it can be very useful to measure water activity in production or storage rooms, e.g. inspection of bulk materials to ensure they meet specifications. Is ideal for measuring water activity in production processes such as random checks of cheese, meat, tobacco, building materials, animal feeds, bakery products, paper, medicines, horticulture, agriculture, etc.

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Water Activity Measurement

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Water Activity Probes

Insertion Probes for Water Activity Measurement

Laboratory Analyzer for Water Activity Measurement

Handheld Instrument for Water Activity Measurement