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Brabender Messtechnik® 
GmbH & Co. KG
Kulturstrasse 51 – 55
47055 Duisburg

Phone +49 203 99819-0
Fax +49 203 99819-22

Moisture Meter for Plastics according to ISO 15512

Since 30.04.2019 the measuring method of our AQAUTRAC - 3E is described as method E - Determination of water content by calcium hydride method, in ISO 15512:2019 "Plastics - Determination of water Content". The Karl Fischer titrator is also mentioned in the same standard. The water content of High - Tech plastic material has a great influence on the quality of the finished product. The test should be made swiftly on an instrument having a simple test procedure.


AQUATRAC® - 3E is the result of continual further development of the popular AQUATRAC product, which has been on the market for at least 30 years now. Developed primarily for the plastics-processing industry, the device measures the moisture content of granular solids. AQUATRAC® - 3E is robust, compact and easily transportable thanks to its new mobility! This means there are many different ways to use AQUATRAC® - 3E directly at the production site, for example:

  • To check incoming granulates
  • To monitor and optimise the drying of granulates
  • To measure granulates right at the machine
  • To take measurements from a finished component, e.g. after conditioning
  • To take laboratory measurements
  • And many more!

As the principle of operation is an absolute chemical method, no calibration is required for each different substance tested. AQUATRAC® - 3E can be used independently of a computer or other peripheral.


With the AQUATRAC® - 3E different ranges are obtained by different sample weights. AQUATRAC® - 3E is able to detect even the most minute traces of moisture (less than 0.01 % H2O) in large, representative testing samples (up to 100 g). In the case of lower-weight samples, the measuring range can be increased to detect very high degrees of moisture. Since AQUATRAC® - 3E is now able to achieve ultra-precise readings using a single measuring cup, it is no longer necessary to switch from one measuring cup to another.

Measuring procedure

The measuring volume consists mainly of the sample container, which contains the sample and the reagent. Weighing the sample there is no need to meet the exact value. The actual weight is fed into the instrument. This simplifi es the handling. The sample is placed into the sample container which is then evacuated by the built - in vacuum pump, which takes approx. 30 sec. The pressure obtained is lower than 10mbar. The sample container is then heated up to the selected temperature (between 60 °C to 200 °C). Operating the AQUATRAC®- 3E involves only a few simple steps, which are executed via the device’s touch screen. If the user prefers, he can also have the touch screen guide him step by step through the measurement process.

Measuring principle according to ISO 15512:2019 "Plastics - Determination of water Content"

Water and calcium hydride react according the following equation, producing hydrogen:

CaH+ 2 H2O → Ca(OH)+ 2 HThis reaction takes place in the sealed reaction vessel of AQUATRAC® - 3E. It is evacuated by using a built - in vacuum pump, before the measurement. The container is then heated up to the measuring temperature. The evaporating water reacts with the reagent calcium hydride to generate a gas. The gas produced is hydrogen; the gas pressure is proportional to the water content in the sample and is monitored by means of a piezoelectric transducer. AQUATRAC® - 3E calculates the ratio of pressure to sample weight and displays the result in terms of H2O content, either as a percentage or in parts per million (ppm). Volatiles other than water do not react with the reagent and will condense, hence not influencing the reading. The reagent is placed in a mesh based insert above the sample. The partial pressure in the gas system is zero; therefore the total water content is accurately measured. This, in combination with the heat applied and the vacuum, means results are obtained in a short time. Furthermore the test is not affected by the presence of oxygen and no carrier gas is needed. Since 30.04.2019 the measuring method of our AQAUTRAC - 3E is described as method E - Determination of water content by calcium hydride method, in ISO 15512:2019 "Plastics - Determination of water Content".


AQUATRAC® - 3E contains an extensive product data bank with the required default settings for bulk density and measuring temperature. This allows measurements to be taken quickly, without having to input the necessary parameters each time. The databank can be expanded or updated at any time, ensuring a perfect fit for individual customer needs!

Product data base

The AQUATRAC® - 3E contains an extensive product data bank with the required default settings for bulk density and measuring temperature. This allows measurements to be taken quickly, without having to input the necessary parameters each time. The databank can be expanded or updated at any time, ensuring a perfect fi t for individual customer needs!


Thermoplastics, e.g.

  • Acrylonitrile butadiene styrene ABS
  • Polybutyleneterephthalate PBT
  • Polyamide 6.6 PA 6.6
  • Polyamide 6 PA 6 GF 30
  • Polyamide 12 PA 12
  • Polycarbonate PC
  • Polyester PET
  • Polyester-elastomer TPE
  • Polyether imide PEI
  • Polyethylene HDPE
  • Polyethylene LDPE
  • Polyethyleneterephtalate PETP
  • Polymer blend PETP/PC
  • Polymethylmethacrylate PMMA
  • Polypropylene PP

For calibration of AQUATRAC® - 3E the standard sodium molybdate dihydrat according DIN EN ISO 15512 is used.

Data storage

The AQUATRAC® - 3E's internal memory can store up to 500 readings. Measurement results can be easily transferred to a computer for further processing via an USB stick. By connecting a printer, one can even print out the results data directly from AQUATRAC® - 3E.

Technical data

    AQUATRAC® - 3E  
Measuring principle   Chemical reaction with calcium hydride according to ISO 15512:2019  
Sample weight   0.1 g - 100 g according to range  
Test temperature   80° C - 200° C in 1° C steps  
Measurement accuracy:

±2% of reading
±1% of range
approx. ±1% of reading
  • smaller 0.1 %
  • 0.1 % - 0.5 %
  • bigger 0.5 %
Test time   10 - 45 min. dependent on material  
Display   % H2O or ppm  
Power supply   100 - 230 V (50/60 Hz, 450 W) / dependent on version  
Dimensions (w x d x h)   51 cm x 32.5 cm x 23 cm
Weight   13.0 kg / 14.8 kg


jeannette hantsch

Your Contact

Jeannette Hantsch

Phone +49 203-99819-14
Fax +49 203-99819-22

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