aWLife, Water Activity Meter

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aWLife Water Activity Meter

The aWLife water activity meter from Steroglass is a high-precision analytical instrument designed to measure the water activity (aW) of solid, semi-solid, and liquid samples. Water activity is a key parameter for determining product safety, quality, and shelf life because it quantifies the amount of free (unbound) water available for chemical and microbial activity. Accurate aW measurement helps predict the risk of microbial growth, improve formulation stability, and ensure regulatory compliance in quality control and R&D environments.

Industries

The aWLife meter is suitable for a wide range of industries where controlling water activity is critical

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Technical Information

Measurement range: From 0,030 to 1,000 aw

Accuracy: ± 0,003 aw at + 25°C (± 1°C)

Repeatability (standard deviation):± 0,001 aw

Calibration: Single and selective, with single-use calibration standards (0,150 – 0,250 – 0,500 – 0,760 – 0,920 – 0,984 – 1,000 aw)

Measuring times at equilibrium: <5 minutes on average

Probe sensor: Dew point (sensor required by ISO 21807: 2004 and subsequent 18787)

Display resolution: ± 0,0001 aw (4 decimal places)

Data security: Administrator and user management by password, according to 21 CFR part 11 – guarantee of unchangeability of the recorded data

Complete thermostatic of the sample: Adjustable from + 15°C to + 50°C in 1°C steps, e.g. for stress tests

Operating temperature: From + 5°C to + 50°C

Digital resolution: 0,01°CTemperature accuracy:± 0,2°C

Design: Dew point sensor block with front opening for easy insertion of the sample and simple cleaning, equipped with: fan for homogeneous conditions in the sample chamber, well-sealed chamber to avoid environmental influences, 7” touch screen colour display for easy operation

Ease of use/software: Intuitive with minimal training, pop-up and warning system for easy workflow management

Analysis modes:

• Single: for standard tests

• Continuous: for repeatability tests or measurement of more complex matrix products

• LES: for measurement of complex matrix products, low emission samples, with lower accuracy

• N3: 3 consecutive measurements with an adjustable accuracy; for repeatability tests under limit conditions (e.g. ±0.001 aw)

• ISO 18787: 3 measurements with an accuracy of 0.0003 aw in accordance with ISO 21807/18787

• TEST LIFE: Temperature ramps for product stress: measurement of aw at selectable stress temperature compared to standard conditions; to check water activity at different temperatures (simulating real conditions)IQ/OQ:IQ/OQ documents available on requestConnections:

• Ethernet connection, LIMS connectivity

• USB type B for connection to external PC

• USB type A for data download (.csv) to USB memory stick

• RS-232 for connection to barcode scanner or thermal printerSize (L x W x H):26 x 26 x 17 cmWeight:3.85 kg

Selectable languages: German, English, French, Italian, Spanish