This tube is a specialty tube, part of ETP's catalog of spectrum tubes, made for use with the our power supply Model SP-200. The 26 cm long tubes are capillary-thin over the middle 10 cm, providing sharp, bright spectra. Made with research-grade gases, with 50/50 mixture of Hydrogen and Deuterium. The vapors and non-UV transmitting glass, of these tubes produce spectral lines of high clarity.
Due to global supply chain issues, deliveries may be delayed. We appreciate the patience and continued support of our products.
