Promising easy micro sampling and injection whatever the sampling pressure and the injection temperature , this instrument can be used for gases, liquids, or vapours
The Rolsi sampler-injector was particularly developed for analytical studies by gas chromatography.
It allows reliable and repeatable samplings of all types of fluids: gases, vapours, and liquids, in their equilibrium states.
Its independent heating allows fast vaporisation of the liquids for their transfer inside the carrier gas circuit of the gas phase chromatographs.
The mass of withdrawn samples can vary from one hundredth of milligram to one milligram, thus allowing the use as well of packed columns rather than capillary columns.
For more sophisticated needs, Rolsi is said to be completely compatible with the use of a split mode.
Other applications can be considered - other analytical methods, or use in injection mode of micro-quantities.
A brochure presenting the Rolsi can be found online.
Arfmines says Rolsi is the perfect choice within the framework of sampling in extremely broad ranges of pressures and temperatures.
Compared to the traditional tools, ie loop valves, it allows not only in situ samplings (directly from a cell under pressure or from a line of circulation of products), but also to choose, in a quasi continuous way, the mass of withdrawn samples.
It is not polluting, it is the ideal tool for research tasks (academic and industrial) or process control.
Its maintenance is much easier and less expensive than that of the valves with loops, says the company.
Rolsi evolution III is now available.
Smaller and entirely automatable, it is actuated by an electromagnet which confers it significant complementary advantages.
Thus, in the interests of safety it is normally closed.
Sampling can be carried out only through electric power.
Moreover it can work at various temperatures (up to 300C) without any problem on its operation and any concern for the operator.
The mass of withdrawn samples depends obviously on the pressure of sampling but also on the time of opening, between ten milliseconds and approximately one second, this choice being up to the operator.
Several models are available to work in particular fields of pressures (the range of the models, by fields of pressures and viscosity of withdrawn fluids) cover the range from 3 to 800 bars.
Alternatives exist for the sampling of compounds considered corrosive such as hydrogen sulphide, amines, etc.
