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NK-Series Mercury Lamps from Heraeus Noblelight
 Lamp Selection  An overview of all lamps offered by us for analytical and medical technology
 HG2  More information on HG2 low-pressure mercury lamps from Heraeus Noblelight
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Absorption measurements and fluorimetric measurements require single monochromatic lines with high radiation density. Mercury low-pressure lamps emit a single monochromatic line at 253.7 nm, which is well reproducible and stable.

Heraeus Noblelight NK-series lamps are low-pressure mercury lamps that are stabilised by the geometric form of the discharge tube and by a cover bulb which reduces influences of ambient fluctuations.

NK-series mercury lamps are used in photometers, polarimeters, fluorimeters, refractometers, densitometers and in mercury gas detection equipment. Additionally they are used for wavelength calibration of optical measuring instruments and for disinfection. NK-series lamps are equipped with a quartz material that absorbs the 185 nm line produced in the low-pressure gas discharge. Therefore the NK-lamps do not produce any ozone.
NK-Series Mercury Lamps from Heraeus Noblelight

The guaranteed operating life for all lamp types is 2000 hrs with a reduction of the output of max. 50%. A normal useful operating life can be between 4000 and 6000 hrs. The lamp should be operated at ambient temperatures.

Image: Spectral distribution NK series lamps
Top image: Spectral distribution NK series lamps
Relative Intensity (%) - for all NK lamp types
Wave Length (nm) Intensity Wave Length (nm) Intensity
248 0.1 313 2.8
253.7 100.0 334 0.1
265 0.1 366 2.2
276 0.1 405 1.6
280 0.1 408 1.6
289 0.9 436 1.1
297 0.6 546 1.6
302 0.4 577/579 0.5

UV radiation damages skin and eyes. Always wear protective glasses, gloves and clothing.

 Lamp Type: NK 4/4
Click here for enlarged image: NK 4/4 Mercury Lamp
Part No.: 56001636
Total Length (mm): 116
Outer Bulb Ø (mm): n/a
Discharge Tube Ø (mm): 5
Arc Length (mm): 10
Base: n/a
Ignition Voltage (VAC/VDC): 1000/900
Wattage (W): 3.5
Lamp Voltage (V): 220 ± 20
Lamp Current (A): 0.02
Factor/Radiation Flux* (mW): 5
Radiation Flux at 253.7 nm (mW): 500
Radiation at 253.7 nm (mW cm-2 sr-1): 15

*Example: Factor x Intensity (table above): 2 x 100 = 200 mW

 Type Part No. Price 
NK 4/4 56001636 485.00
All prices are in Euros per piece and are subject to change without further notice.

For further questions, please don't hesitate to contact us.

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