How It Works

Operating a Kern moisture balance is easy as 1-2-3:

  • place sample in drying chamber
  • enter test parameters on keypad
  • press key to start analysis

Controlled Drying Process

Kern models use halogen quartz glass heaters to provide constant even drying of the sample at a temperature pre-selected by the operator. The advanced software closely monitors the temperature in the moisture analyzer drying chamber and maintains it to within 1°C of the chosen setting.

  • MLB 50-3N and MLS 50-3HA160N heats from 50-160°C in steps up to 1°C.
  • MLB and MLS Models offer heating profiles selected from 4 modes: preheating, standard drying, gradual drying, stage drying.
  • MRS 120-3 heats from 30-230 °C with preheating, standard or gradual drying.

As the analysis progresses the moisture balance displays the current status, keeping the operator updated on each stage of the process. The analysis automatically terminates either when drying is complete and the dry weight is stable, or after a fixed time specified by the operator.

Moisture Balance Heating Profiles

Standard drying
Standard drying is the most commonly used drying process. This type of heating is suitable for most substances.

Soft drying
Soft drying is intended for substances that do not tolerate heating by means of halogen heating lamps. There are also substances that form a film when heated quickly; this film influences the evaporation process of the enclosed moisture. For substances of this type soft heating is also suitable.

Fast drying
Fast heating can be used for samples with a moisture content of between 5% and 15%. The temperature is increased very quickly and briefly exceeds the set drying temperature. Then the temperature is regulated down to the set temperature. The sample must contain sufficient moisture.

Step drying
Step drying can be used for substances that show specific behavior during drying. The individual increments regarding duration or temperature increase can be freely selected. The samples should contain at least 15% moisture.

Print or Save Results on PC

The final result is shown on the moisture balance digital display and remains until it is replaced by a new measurement. At the end of the moisture weighing all relevant data concerning initial mass, residual mass, test parameters and results can be printed out via an RS-232 interface. When the moisture analyzer is connected to a PC the data acquisition software allows the operator to produce a graph plotting results against time, providing valuable information on speed of drying and confirmation of dry weight stability. Results of individual tests can be stored in the computer memory for subsequent comparison. All Models meet GLP/ISO record keeping requirements.

Convenient Calibration

The weight calibration program enables quick setting of the moisture analyzer's accuracy. External calibration weights are required, and are available as optional accessories. A temperature calibration set, consisting of a measurement sensor and display device, is also available as an option.

Technical Specifications

Model MLB 50-3N MLS 50-3160N MRS 120-3
Max Sample Weight 50g 50g 124g
Reproducibility
with 2g sample		 0.5% 0.5% 0.2%
Reproducibility
with 10g sample		 0.02% 0.02% 0.02%
Heater type halogen halogen halogen
Heaters 1x400W 1x400W 1x400W
Temp. Range °C 50-160 50-160 30-230
Back to Top
Bookmark and Share

phone

(973) 913-9734

info

GET A QUOTE
OR BROCHURE

email

SUBSCRIBE TO OUR NEWSLETTER

pen

READ OUR RECENT ARTICLES