Low Pressure Mercury Vapour Lamp

Lamp output in the uv range depends on the amount of mercury and vapor pressure of mercury in the lamp.

Low pressure mercury vapour lamp.

One would tip the lamp and electrical contacts on each side of the lamp would send electricity through a liquid mercury which started the lamp. The blue green tint of mercury vapor lamps is caused by the strong violet and green lines. Closed ask question asked 5 days ago. Low pressure mercury vapor lamps are a highly efficient source of uv light particularly short wavelength uv light 254nm and 185nm.

Viewed 18 times 0 begingroup closed. Low pressure lp amalgam low pressure lp and medium pressure mp lamps are all mercury based lamps. What s the difference between low pressure lp amalgam low pressure lp and medium pressure mp uv lamps. Find out information about low pressure mercury lamp.

It is not currently accepting answers. Fluorescent and germicidal lamps are included in this. Low pressure mercury vapor lamps do they always produce both 184 5nm and 253 7nm. A mercury vapor lamp whose partial pressure during operation does not exceed 0 001 atmosphere.

Fused silica is used in the manufacturing to keep the 184 nm light from being absorbed. In low pressure mercury vapor lamps only the lines at 184 nm and 254 nm are present. In case of fluorescent lamp the mercury vapour pressure is maintained at lower level such that 60 of the total input energy gets converted into 253 7 nm single line. These types of lamps are available in ozone producing and ozone free quartz with a variety of phosphors.

Low pressure mercury vapour lamp hg 2 lamp heraeus has developed a compact low pressure low voltage mercury vapour lamp type hg2 principally for use in scientific instrumentation. Active 5 days ago. This question is off topic. Mercury vapor conducts electricity completing the circuit.

Again transition of the electrons requires least amount of input energy from a colliding electron. Explanation of low pressure mercury lamp. Often called germicidal or ozone absorption lamps they are very stable light sources. Amalgam lamps use a mercury amalgam mix to control mercury vapor pressure.

This lamp has a highly stable output predominantly at the 253 7 nm mercury line. Rather than a cold spot the lamp s amalgam spot on pellet regulates mercury vapor pressure during operation and yields up to three times the uvc output of a standard low pressure mercury lamp of the same length. The first mercury vapor lamps were in a lower pressure tube.