Aqualab 4 Duo Specifi Cations - Decagon Devices AquaLab 4TE Operator's Manual

AquaLab
2. About AquaLab
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Read Time : ≤5 min.
Sample Temperature Range: 15 to 50° C
Sample Temperature Accuracy: ±0.2° C
Sample Temperature Resolution: 0.01° C
Sample Dish Capacity: 15ml Full
Operating Environment: 5 to 50° C 20 to 80% Humidity
Case Dimensions: 26.7 x 17.8 x 12.7cm
Weight: 3.1 Kg
Case Material: Lustran 433 (ABS) with fi re retardant
Display: 64 x 128 Graphical
Data Communications: RS232A Serial, 9600 to 115200 baud
Power: 110 to 220 VAC, 50/60Hz
Warranty: 3 year parts and labor
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On samples with no signifi cant impedance to vapor loss

AquaLab 4 DUO Specifi cations

Moisture Content Repeatability: 0.02%
Accuracy to Moisture Content Ref.: 0.1% to 0.5%
AquaLab and Water Activity
Water activity (a ) is a measurement of the energy status of the water
w
in a system. It indicates how tightly water is "bound", structurally
or chemically, within a substance. Water activity is the relative hu-
midity of air in equilibrium with a sample in a sealed measurement
chamber. Th e concept of water activity is of particular importance
in determining product quality and safety. Water activity infl uences
color, odor, fl avor, texture and shelf-life of many products. It predicts
safety and stability with respect to microbial growth, chemical and
biochemical reaction rates, and physical properties. For a more de-
tailed description of water activity as it pertains to products, please
refer to Chapter 3 of this manual, titled " Water Activity Th eory".
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