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AwTherm Water Activity
Stable temperature yields precise measurements.
Temperature-stabilized measurement
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.
 
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.
 
Features
  • 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
 
Download brochure(s):
 
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.
 
User-friendliness
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.
 
Water activityContaminants
aw = 0.91..0.95Many bacteria
aw = 0.88Many yeasts
aw = 0.80Many mildews
aw = 0.75Halophile bacteria
aw = 0.70Osmiophile yeasts
aw = 0.65Xerophile mildew

AwTherm Water Activity

Quantity
  • DEVICE TYPE Temperature-stabilized water-activity measurement
    SAMPLE SIZES Variable (14 mm / 40 mm)
    SAMPLE CONTAINER DIMENSIONS AwT-PS14: Ø46 x 14 mm
    AwT-PS40: Ø46 x 40 mm
    OPERATING RANGE 1...40 °C (34...107 °F)
    ACCURACY ±0,005 aw (10...30 °C)
    ±0,1 °C (±0,18 °F)
    MEASURING RANGE 0.005...1.000 aw
    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)
    POWER SUPPLY / POWER CONSUMPTION 110...230 V / 50...60 Hz
    ≤2 A
    LONG-TERM STABILITY <0.01 aw/year
    HUMIDITY SENSOR Hygromer IN-1
    TEMPERATURE SENSOR PT100 1/3 DIN Class B
    CALIBRATION / ADJUSTMENT Aw & Temperature:
    HG2-S (probe removed with AwT-CAL)
    Aw:
    ROTRONIC humidity standards (via HW4)
    DISPLAY TYPE 8-line LCD with touch operation
    HW4 COMPATIBLE Yes (v 3.6.0 and higher)
    TREND INDICATOR Yes
    AW-QUICK MODE Yes
    FIRMWARE UPDATE Via USB port
    COMMUNICATION INTERFACES Micro USB
    HOUSING PC / ABS
    IP PROTECTION RATING IP21
    STANDARDS ISO 21807
    CE / EMC CONFORM EMC 2004/108/EC
    IEC EN 61010-1:2010
    MAINTENANCE Annual calibration (recommended)
    DIMENSIONS 400 x 180 x 180 mm
    WEIGHT 4200 g
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