This is a used Alltech Varex MKIII Evaporative Light Scattering Detector (ELSD).
The Alltech Varex MKIII Evaporative Light Scattering Detector is a high-performance analytical instrument used to detect and measure small molecules and biomolecules in liquid chromatography systems. It utilizes evaporative light scattering detection (ELSD) technology to detect the concentration of samples without the need for a labeled or specific ligand. The MKIII model features enhanced sensitivity and improved signal-to-noise ratio, making it suitable for a wide range of applications such as biopharmaceutical analysis, environmental analysis, and forensic analysis.