Portable Laboratory Water Activity Meter

csm_water_activity_meter_humimeter_RH2_cc05a3e0de

humimeter RH2 water activity meter

Lab Quality Measurements

Precise water activity meter with data logger, suitable for measuring foods like butter, fruit mix, spices, granulate, mushrooms, xylit, flour, biscuits or sausage as well as all other food types, as well as petfoods, medicinal herbs etc. requiring a check of the water activity value.

Measuring range 0.03 to 0.98 activity of water
Resolution 0.001 aw
Calibration 0.10 to 0.80 +/- 0.01 activity of water
Calibration 0.00 to 0.10 and 0.80 to 0.98 +/- 0.04 aw (at 25°C)
Temperature range 0 to + 50°C, calibration +/- 0.5°C (at 25°C)
Measuring range of relative humidity 0 to 100% rh, resolution: 0.1% rh
Dew point -55°C to + 60°C, resolution 0.1°C,
Absolute humidity 0 to 130 g/m³, resolution 0.1 g/m³
Equilibrium moisture content 2% to 30%, resolution 0.1%
User programmable characteristic curves for calculation of equilibrium moisture content
Online-function, Hold function, manual data memory
Automatic datalog for up to 10,000 logs with measuring point report
Optional: humimeter USB data interface module with LogMemorizer measuring data recording and analyzing software on USB flash drive incl. USB cable for PC and printer

Portable Laboratory Water Activity Meter Benefits

Relative humidity, absolute humidity, dew point, equilibrium moisture content, aw-value
Long stable humidity sensor

Easy data storage at the portable moisture meter
Analysis on the PC and printer available
Optimal documentation of your quality

Portable Laboratory Water Activity Meter Kit

The water activity of products, especially of food, indicates the amount of unbound water in a material. This quality factor, also called aw value, depends on the water vapour pressure in the material, on the current temperature and on the water vapour pressure of the surroundings.

The humimeter RH2 water activity meter enables the quick and easy determination of the water activity. Furthermore, due to the large sample volume of the water activity measuring chamber, higher quantities can be measured within a short time. This enables a higher number of taken random samples.

The simple handling guarantees a cost-saving and faultless process of measuring the activity of water value of food. Just fill the material into the activity of water measuring chamber and close it.

After an appropriate conditioning time (time period until a constant climate in the chamber is reached = moisture equilibrium)

the water activity can directly be read off the display of the humimeter RH2 water activity meter.

The time period until reaching the moisture equilibrium strongly depends on the material to be measured as well as on the temperature. Hygroscopic materials like cornflakes assimilate in a considerably shorter time than whole maize grains. In this context it is important that the samples have the same temperature than the measuring instrument resp. the measuring chamber – high temperature differences lead to a longer conditioning time.

This conditioning time depending on the material is a physical phenomenon and cannot be shortened artificially.

Generally, the conditioning time ranges from 5 minutes to about an hour.

The moisture equilibrium is achieved when the displayed measuring value is no longer changing for a period of several minutes (e.g. 10 minutes, changes less than 0.002 aw).

Contact us today on freephone 0800 724 633 or email info@scienze.nz to learn more about the humimeter RH2 water activity meter.

What is water activity and why is it measured?

Water activity (aw) is a ratio of partial pressures between a substance and pure water. To put it simple, it is a measurement of ‘available water’ in a substance and it determines the degradability and stability of a product which affect the shelf life directly e.g. Available water can be used by microbes to promote their growth. By taking aw into account during food product R&D, manufacturer can create a recipe with extended shelf life. Food safety is a great concern in food manufacturing processes and by measuring the aw of the product as part of quality control, safety standards can be maintained along the production line.

To learn more about how you can measure the aw in your products please contact us on freephone 0800 724 633 or email info@scienze.nz

Portable Laboratory Water Activity Meter Accessories