Hollow Cathode Lamps

Hollow cathode lamps contain a cathode made of the element to be analyzed, a metal anode, and a low-pressure gas (like neon or argon). When voltage is applied, the gas becomes ionized and excites the metal atoms in the cathode, causing them to emit light at specific wavelengths unique to that element. This light is then used to detect and measure the concentration of that element in a sample. HCLs provide high sensitivity and element-specific accuracy in spectroscopic analysis.