Schaller Malaysia humimeter RH2-aw Water Activity Meter
with aw-value measuring cell set
RH2-aw | Applications
Portable laboratory instrument for determination of water activity (aw value) of food with datalog function. Suitable for measuring materials like butter, fruit mix, spices, granulate, mushrooms, xylit, flour, biscuits or sausage as well as all other food types requiring a check of the water activity value.
The measuring cell (code 14500) offers a small sample volume and inserts made of plastic. A much smaller sample volume is required here and can therefore be filled with crushed and ground samples or also with liquids such as sauces and pastes. The plastic vessels must be almost completely filled in order to achieve a good measurement result and rapid adjustment behavior. After the measurement, they can be easily exchanged or cleaned.
It is important that the sensor is not exposed to acids, bases, solvents or excessive salt concentrations!
RH2-aw | Features
- Temperature can be set to °C or °F as required
- Equilibrium moisture content synthetic granules resolution 0.01 %
- 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
- Supplier-Management
- Menu languages: English, German, Italian, French, Spanish, Russian and many others on request
RH2-aw | 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
RH2-aw | Scope of Delivery
- humimeter RH2 with rubber protection cover
- Code 14500: Aluminium water activity measuring cell 25 ml with attachable humidity-temperature sensor with 2 meter connection cable – with accessories: 10 pcs. plastic inserts PP 25 ml for the measuring cell, calibration ampoule set art. no. 10005, factory calibration certificate art. no. 10403, plastic case art. no. 13624
Water activity of food & handling of device
- 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 that is 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).