The technical use of adsorption processes reached increasing importance during the last decades. The applications are widely diversified, ranging from biogas processing to medical technology or gas storage. The manometric method is a well established technique to measure adsorption isotherms. Major advantages of manometric instruments are short measurement times and a high grade of automation. October 2016: Relase of our manometric instrument in an new compact design!

This instrument allows the simultaneous measurement of up to 5 samples. The fully automated apparatus is developed for time saving measurements like material screenings. It can be used to measure adsorption isotherms at pressures of up to 100 bar and within a temperature range of 20°C and 300°C. An adjustable geometry of sample containers allows highly accurate sorption measurement on smallest sample amounts. The new version of our Multiport Analyzer contains proven measurement technology in a new compact design!.

Best possible measurement accuracy is ensured by using high quality pressure and temperature sensors. A user-friendly software interface allows the programming of all measurement parameter. In addition, online data is used for integrated calculation of measurement results (e.g. sorbed gas amount). The standard version of our instrument can be modified accoriding to costumers specifications (e.g. extended pressure range of up to 200 bar, integration of cooling device).

Measurement Method

In course of manometric adsorption measurement, a dosing volume with calibrated size is pressurized with sorptive gas. After detection of pressure and temperature values the gas is expanded into a sample volume, including sample material. The resulting pressure decrease is based on volume increase and sorption effects. The sorbed gas amount can be calculated using a gas mass balancing.

Based on the commonly used manometric method the RuboLab MPA uses an improved measurement method which allows the simultaneous measurement of several sample materials. Thereby the sample volume is equipped with additional pressure and temperature sensors. After expanding the sorptive gas into the sample volume, the sample volume will be separated when the pressure signals of both sensors are equal. Consequently the sorption based pressure decrease is mainly detected by the sensor placed in sample volume. In this way, the dosing volume is free to be used for another sample.

Product Highlight

Service for weight loss measurement of samples is included
In general the sample material is pretreated before sorption isotherm measurement to desorb impurities. Isotherm description occurs by using the adsorbed gas amount depending on the pretreated sample mass. The use of external degassing devices often leads to re-contamination of sample material before starting the manometric measurement. For this reason our instrument uses an in situ pretreatment procedure using an electrical heating device. For highly accurate detection of sample mass we offer an included service for weight loss measurement of your sample materials. Purchasing a RuboLab Multiport Analyzer includes the gravimetrical sample mass measurement of 10 samples each year.

Screening
The improved manometric method of RuboLab MPA allows a time and cost efficient measurement of up to 5 sample materials within a wide pressure and temperature range. In former measurement campaigns the instrument has been used to measure hundreds of isotherms in only a few weeks.Thereby, the workload of the user is minimal, caused be automated measurement performance (including pretreatment, reference measurement as well as adsorption measurement) and integrated isotherm calculation!