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

  • CL-Hg Mercury Wavelength Calibrator

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 typeGermicidal low pressure mercury lamp
Nominal lamp power and voltage75W, 220 VAC (no PSU or ballast required)
Operating current27mA
Expected lifetime500 hours
Most prominent spectral lines253.65nm, 296.73nm, 365.02nm, 404.66nm, 365.02nm, 404.66nm, 576.96nm, 579.07nm
Calibration frequencyNot applicable


Compatibility4 x M3 clearance holes in Bentham slit pattern
Dimensions216L x 67W x 67H (mm)
CL-Hg Calibration Standard Dimensions - Top view
CL-Hg Dimensions - Top view
CL-Hg Calibration Standard Dimensions - Front view
CL-Hg Dimensions - Front view
CL-Hg Calibration Standard Dimensions - Side view
CL-Hg Dimensions - Side view
Typical CL-Hg Measurement Data
Typical Spectral Distribution of CL-Hg

Ordering Information

CAL_CL-HGWavelength calibration standard

Atomic Line Database

The Bentham Standard

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