Laboratory Analyzer for water activity measurement
AwTherm - Water Activity Meter
Stable temperature yields precise measurements.
With AwTherm, ROTRONIC offers a professional, high-end laboratory unit for temperature-stabilized measurement of water activity in the foodstuffs, cosmetics, or pharmaceutical industries.
The wide control range permits measurements to be integrated directly in the tempered manufacturing or storage process. Water-activity measurement reacts very sensitively to variances in temperature. Stabilizing the temperature prevents imprecise results due to external temperature influences.
Exchangeable measuring head
A further advantage of AwTherm is that the measuring head is removable, which means that the probe can be temperature-calibrated or adjusted to give high precision.
The AwTherm shows its paces in island-operation mode, with its simple handling and clarity. No laboratory should be without the device in conjunction with the ROTRONIC HW4 software
Why measure water activity?
The free water in a product influences its microbiological, chemical and enzymatic stability. If there is too much free water present, the products spoil; too little water can be detrimental to the product characteristics.
|aw = 0.91..0.95||Many bacteria|
|aw = 0.88||Many yeasts|
|aw = 0.80||Many mildews|
|aw = 0.75||Halophile bacteria|
|aw = 0.70||Osmiophile yeasts|
|aw = 0.65||Xerophile mildew|
Measuring water activity provides useful information about characteristics such as cohesion, storage lifetime, clotting or pourability of powders, tablets, etc., or the adhesive properties of coatings.
- ROTRONIC HYGROMER® IN-1
- Highest precision through exact stabilization of temperature
- Wide temperature-control range
- Excellent reproducibility
- Excellent long-term stability
- Variable size of sample container
- Reference probe exchangeable for calibration or cleaning
- Quickest measurements with the AwQuick function
- Simple operation via Touch Interface
- Conforms to ISO 21807 / EMC 2008/108/EC / IEC EN 61010-1:2010
ROTRONIC provides a high-end laboratory device, the HygroLab C1, for water activity measurements from as many as four separate probes. Use multiple stationary probes and insertion probes for measuring water activity in cheese, meat, tobacco, building materials, animal feed, pharmaceuticals products and much more.
|Humidity sensor||Hygromer IN-1|
|Temperature sensor||PT100 1/3 DIN Class B|
|Long-term stability||<0.01 aw/year|
|Measuring range||0.005...1.000 aw|
|Calibration / adjustment||Aw & Temperature:
HG2-S (probe removed with AwT-CAL)
ROTRONIC humidity standards (via HW4)
|Power consumption||110...230 V / 50...60 Hz
|Dimensions||400 x 180 x 180 mm|
|Operating range||1...40 °C (34...107 °F)|
|Display type||8-line LCD with touch operation|
|Software Update||Via USB port|
|IP protection rating||IP21|
|Communication interfaces||Micro USB|
|Housing||PC / ABS|
|HW4 compatible||Yes (v 3.6.0 and higher)|
|CE / EMC conform||EMC 2004/108/EC
IEC EN 61010-1:2010
|Maintenance||Annual calibration (recommended)|
|Device type||Temperature-stabilized water-activity measurement|
|Accuracy||±0,005 aw (10...30 °C)
±0,1 °C (±0,18 °F)
|Sample sizes||Variable (14 mm / 40 mm)|
|Sample container dimensions||AwT-PS14: Ø46 x 14 mm
AwT-PS40: Ø46 x 40 mm
|Temperature-control range||0...60 °C (32...140 °F)|
|Temperature stability||±0,01 °C/min (±0,018 °F/min)|
|Chamber-temperature gradient||<0,1 °C (<0,18 °F)|