Rotronic AwTherm Water Acitivity Meter

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.

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 Activity                   Contaminants
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 61010-1:20103
• Includes:
  USB Cable, 1.8m, type A-B
  PS14 – 100 disposable sample cups, 14mm deep (0.55″)
  PS40 – 100 disposable sample cups, 40mm deep (1.57″)
  HW4-P-QUICK – Software and USB connecting cable to PC
  EA00 – Humidity Standard 0.5%RH (Five vials per box)
  EA10 – Humidity Standard 10%RH (Five vials per box)
  EA35 – Humidity Standard 35%RH (Five vials per box)
  EA80 – Humidity Standard 80%RH (Five vials per box)
  AC1211 AC power adapter 100-240 VAC / 12 VDC

• Rotronic AwTherm Datasheet.pdf