Protea Limited products

Fourier-Transform Infra-Red spectroscopy is a full-spectrum analytical technique that allows all IR absorbing species to be detected and measured by a single instrument. Protea has been at the forefront of FTIR technology in process and emissions measurement and prides itself on making the relatively complex operation of FTIR as simple and useful as possible. The make-up of an FTIR analyser is of a modular design – infra-red source, interferometer, sample compartment, detector and control/processing electronics, including PC. Each component part can be tuned or altered giving difference performance for certain applications; however the overall principal is the same.

For highly selective gas measurements of one or two gases, Tunable Diode Laser Absorption Spectroscopy (TDLAS) has been introduced by Protea into compact and easy to use industrial gas analyser systems.

Mass Spectrometry is a useful mechanism for gas analysis in process applications, being able to detect and measure almost all gases with low detection limits and fast response. A mass spectrometer measures the mass-to-charge ratio of the molecules in a sample and by collecting and analysing the mass spectrum we can identity and quantify which molecules are present.

For measurement of oxygen (O2), the zirconia (ZrO2) lambda sensor is used by Protea. This sensor responds to the difference in oxygen concentration on the sample gas side of the sensor, compared to the reference side (ambient air). This response manifests itself as a non-linear induced voltage. This voltage is linearised and calibrate via electronics to give a concentration reading in %Volume. The zirconia sensor is ideally suited as a complimentary analyser to the multi-gas measurements of infra-red systems where oxygen content is required for compliance and reporting purposes.

For spectroscopic absorption measurements of gas and liquid phase samples, correct choice of gas cell is paramount. Protea can supply a complete system with optimum sample cell, or we can provide a sample cell for your current instrument. We can provide FTIR gas cells, laser gas cells, FTIR liquid cells and process flow cells.