Rotronic HP23-AW-A Water Activity Meter

The Rotronic HP23-AW-A Water Activity Meter is a hand-held water activity indicator with data logging capability. The HP23-AW-A is useful in a number of applications such as spot check measurements to confirm product stability and indicate shelf life.

The measurement of water activity is a key parameter in the quality control of moisture-sensitive products or materials. Water activity is a measure of the water vapor pressure generated by the free or non-chemically bound water in foods and other products. The bound water and moisture content cannot be measured with this method. The free water in a product influences its microbiological, chemical and enzymatic stability. This is especially important in the case of perishable products such as foodstuffs, grain, and seeds as well as in many products in the pharmaceutical and cosmetic industries. If there is too much free water available, the products spoil, and if there is too little water available, other product properties can be influenced negatively. The measurement of water activity also provides useful information on properties such as the cohesion, storage life, agglomeration or pour-ability of powders, tablet stability, and the adherence of coatings.

The HP23-AW-A measures water activity (range: 0.00 to 1.00 Aw), relative humidity and temperature. These measurements allow a number of parameters to be calculated. Each of two probe inputs can be configured to accept either a digital HygroClip 2 humidity-temperature probes (factory default) or an analog probe measuring any signal such as barometric pressure, air velocity, etc. An internal memory stores up to 8 x 250 values in capture mode or 10,000 values in logging mode. The HP23-AW-A includes an AwQuick option which provides accurate Aw measurements of most products in about 5 minutes.

The Rotronic HP23-AW-A-Set-14 ships complete with:

• HC2-AW probe for the measurement of product samples
• WP-14-S sample holder
• PS14; 100 disposable sample cups, 14mm deep (0.55")
• EA10; Humidity Standard 10%RH (Five vials per box)
• EA35; Humidity Standard 35%RH (Five vials per box)
• EA50; Humidity Standard 50%RH (Five vials per box)
• EA80; Humidity Standard 80%RH (Five vials per box)
• AC1124; Carrying Case

The Rotronic HP23-AW-A-Set-40 ships complete with:

• HC2-AW probe for the measurement of product samples
• WP40S; Dual 14mm/40mm sample cup holder (with insert)
• PS-40 disposable sample container (100pc)
• EA10; Humidity Standard 10%RH (Five vials per box)
• EA35; Humidity Standard 35%RH (Five vials per box)
• EA50; Humidity Standard 50%RH (Five vials per box)
• EA80; Humidity Standard 80%RH (Five vials per box)
• AC1124; Carrying Case