CL-Hg Wavelength Calibration Standard (250-600nm)

  • CL-Hg mercury-lamp calibration reference standard 250-600nm

Selected for convenience, stability and for the range of atomic lines available, the CL-Hg lamp may either be mounted to the exit slit of any monochromator or spectroradiometer, or implemented in a free-standing configuration.

The mercury spectrum contains no useful lines above 579.07nm, however shorter wavelength lines may be used to calibrate monochromators by exploiting higher grating diffraction orders. For example, the green 546.08nm line may be used to calibrate monochromators in second (1092.16nm) or third order (1638.23nm).

Core benefits


  • Includes germicidal, low pressure mercury lamp (250-600nm) with 2000 hour expected lifetime
  • Used in free space or coupled to the entrance port of any monochromator or spectroradiometer
  • Can be used in higher diffraction order to calibrate over wider spectral range


Lamp type

Germicidal low pressure mercury lamp

Nominal lamp power and voltage

6W, 220 VAC (no PSU or ballast required)

Operating current


Expected lifetime

500 hours

Most prominent spectral lines

253.65nm, 296.73nm, 365.02nm, 404.66nm, 365.02nm, 404.66nm, 576.96nm, 579.07nm

Calibration frequency

Not applicable



4 x M3 clearance holes in Bentham slit pattern


216L x 67W x 67H (mm)

Ordering Information


Wavelength calibration standard

Atomic Line Database

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