SPECTRUM TUBES: 50mm Capillary

These quality 'Geissler type' gas discharge spectrum tubes have an electrode at each end with a fine capillary tube in the middle which effectively demonstrates the spectral lines of pure substances with a colour discharge. Note: Items containing Mercury are prohibited in schools so item EO-PH1196B-13 is not suitable for supply to schools. Use intermittently and do not use as a lamp source. We offer a power supply specifically for powering these tubes, click POWER SUPPLY & SPECTRUM TUBE.