Spectrum Tube Helium 260mm

High quality, straight-form spectrum tubes to effectively demonstrate the spectral lines of pure substances. 260 mm in length with a large 10cm capillary in the center for greater viewing area. These spectrum tubes are designed for operation intervals of 30 seconds, and should be used for 30 seconds on / 30 seconds off (for intermittent use only, not to be used as a lamp source). Spectrum tubes require spectrum tube power supply, and are recommended for use in conjunction with the Spectrum Tube Holder with Power Supply (code: PH1197A).