Projekt Messtechnik - Sorption test system SPS; Detail views

		SPS-x
		Details

The SPS Dynamic Vapor Sorption Test System in detail

Fig. 1: The SPS Dynamic Vapor Sorption System

Fig. 1 shows the SPS23-100n with controll computer and monitor. The new series excels by a compact design allowing the setup at a standard sized lab table, advantageous especially at limited laboratory space.

Fig. 2: SPS Sorption Test System; climate chamber with open cover;
open test chamber with sample tray and sample pans made of aluminum (weighted samples are on the outer circle).
The samples at the inner circle of sample tray contain non weighted samples to allow the withdrawal
of sample amounts under a running experiment;

Fig. 2, shows the open test chamber.
All samples are in a climatic chamber with optimized airflow. The air flows along the sample surface and grants Dynamic Vapor Sorption behavior.
Depending on the chosen option the sample pans are available in diameters of 18mm (SPS23-100n) through 30mm (SPS23-10µ) up to 50mm (SPS11-10µ).
These sample pans are placed in sample trays with 12 or 24 sample positions. The empty sample pan of first sample position is used as internal reference.
The dimensions of these sample dishes are especially selected for an optimized surface to volume ratio of the samples. The chosen layout allows the investigation on materials with very thin layers, ideally in monolayers allowing optimized sample kinetics.
In combination with the high gravimetric dynamic range this layout also allows the analysis of representative sample amounts (e.g. the analysis of powders or bulk materials or several tablets), voluminous and lightweight samples as textile fibres (e.g. wool) and down as well as bulky shaped samples (rock and concrete sections, plastics etc.).
The transparent cover made of highly isolating glass allows the observation of the samples over the entire experiment. Visible changes like discolorations, liquefactions etc. can be continuously monitored and documented.
An autosampler turns the sample tray and places the samples on a analytical balance with a resolution of 100 Nanogramm (SPS23-100n) respectively 10 Microgramm (SPS11-10µ). This motion scheme is continuously performed for all selected sample positions. The performance of the balances allows the investigations on smallest sample amounts (several milligrams) as well as of heavy and bulky samples (e.g. building materials, minerals). The high precision and reproducibility of the system is granted by the software integrated fully automatic self calibration routine of the balance. The changes in mass of the sample dishes caused by climatic influences during an experiment are continuously compensated with the reference sample (drift compensation).

back>>>