Low pressure mercury lamp (20W)

GY-4/4A low-pressure mercury lamp (20W)
GY-4/4A low-pressure mercury lamp (20W) description:
GY-4/4A) can be used with a standard light source to verify and adjust the wavelength accuracy of the instrument. It can also be used to check the resolution of the instrument with the resolution of the "Gongsan line". With the DF-2 sample cell, it can also perform fluorescence analysis on certain samples. (Sodium bulb replacement can be used for GY-5) GY-4 (height not adjustable) GY-4A (height adjustable)

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