Schaller Humimeter RH2 Water Activity Meter

Alat Laboratorium Mikrobiologi

Deskripsi produk
humimeter RH2 water activity meter
Analyzer for determining water activity (aw value)
Aw value measuring range from 0,03 to 0,99 aw
Resolution 0,001 aw
Calibration 0,10 to 0,80 +/- 0,01 aw
Long-term stable sensor technology
for determination of moisture content in food
Measuring chamber or measuring cell (depending on product volume)
Lifetime Support
Features
Water activity indicates the amount of unbound water (free water) in a material. It is an important factor in food preservation and quality control - for example for the shelf life of meat or other foods. This quality factor, also known as the aw value, depends on the water vapor pressure in the material, the current temperature and the water vapor pressure in the environment.

The humimeter RH2 food moisture content meter allows quick and easy measurement of water activity. We offer two different sensors:

The measuring chamber Due to the large sample volume, larger quantities can be measured within a short time. This enables a higher number of random samples to be drawn.
The cell again is used for very small sample amounts. In addition, the sensor can be replaced here.
Many products can be measured, such as butter, fruit mixtures, spices, granules, PVC, mushrooms, xylitol or seasoning.
With our aw value measuring instruments for food, the shelf life and quality can be secured and controlled.

The measuring device is a laboratory device and enables measurements in accordance with EN ISO 21807.

In the download area you will find the instructions for calibration and adjusting the water activity meter humimeter RH2.

FAQ:
What is the water activity?
Water activity is a measure of the free water available in a substance or product and its ability to support the growth of microorganisms such as bacteria, yeast and mold. It is defined as the ratio between the vapor pressure of water in a substance and the vapor pressure of pure water at the same temperature and is expressed as a dimensionless value between 0 and 1.

Why is the aw value measuring device important for food?
Water activity is an important factor in food preservation and quality control. Foods with high water activity, such as Fresh fruits and vegetables, for example, are more susceptible to spoilage and deterioration because the water in the food provides an ideal environment for microorganisms to grow. In contrast, foods with low water activity, such as B. Dried fruit, can be kept much longer, since the low water activity makes it difficult for microorganisms to grow.

Can the aw value measuring device also be used for meat?
Yes, the huimeter RH2 the water activity meter for food is used for meat. Fresh meat has the highest water activity. The preservation reduces the availability of moisture for the microorganisms.

What is Equilibrium Moisture?
Equilibrium moisture content is the moisture content that a material or substance will absorb and retain at a given temperature and relative humidity when in a steady state. As relative humidity increases, the material absorbs moisture until it reaches equilibrium. As the relative humidity falls, the material sheds moisture until it regains equilibrium.
Benefits
Aw value, relative humidity, absolute humidity, dew point, equilibrium moisture content
Fast adjustment behavior
Long-term stable humidity and temperature sensors
Easy data storage on the portable moisture meter
Optimal documentation of your quality
portable handset
High measuring accuracy
Technical data
Relative humidity
Measuring range see sensor, resolution 0,1% RH
Temperature:
Measuring range see sensor, resolution 0,1 °C
Dew point
-55 to +60°C, -67 to 140°F
Absolute humidity
0 to 130 g/m³, resolution 0,1 g/m³
Equilibrium wood moisture content
2 to 30%, resolution 0,1%
Equilibrium moisture content granules
Resolution 0,01%
Aw value
0,0 to 1,0, resolution 0,001
Memory function
Online function, hold function, manual datalog
Automatic datalog
Datalog for 10.000 values with measuring point report
Dimensions
145 x 75 x 30 mm
Weight
210 g (including batteries)
Power Supply
4 x 1,5 Volt AA Alkaline batteries
Menu languages
English, German, Italian, French, Spanish, Portuguese, Czech, Polish, Russian, International

Further information
Instruction manual humimeter RH2-AW
Instruction manual calibration and adjustment humimeter RH2
Handling and measurement process
The simple handling guarantees a cost-saving and error-free measurement of the activity of the water value of food. Simply fill the material into the aw value 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 it takes to reach moisture equilibrium depends heavily on the material to be measured and the temperature. Hygroscopic materials such as cornflakes assimilate in a much shorter time than whole corn kernels. In this context, it is important that the samples have the same temperature as the measuring device or the measuring chamber - high temperature differences lead to a longer conditioning time. This material-dependent conditioning time is a physical phenomenon and cannot be shortened artificially. Generally, the conditioning time is 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).



Hubungi :

Juni Tarigan (Mr.)

0811 198 0702


Pera (Ms.)

0811 3801 0819


Admin

0813-2310-201


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Jakarta Pusat - Indonesia 10640

Telp : +6221-42803207, 4227517


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