Flexim
To meet the requirements of the chemical industry, versions of the PIOX R400 process refractometer (photo) for use in explosive atmospheres from ATEX Zones 2 to 0 are now available. The device measures the light transmitted through the entire volume of the sample, instead of a thin film between prisms. As a result, higher resolution and extremely high precision are achieved. Also, the measurement is less sensitive to deposits forming on the prism compared to critical-angle reflectometry. The instrument uses dual beams of light, which allows for completely drift-free differential measurements, even with deposits. — Flexim GmbH, Berlin, Germany