1. Required Wavelength Range
Start by identifying which spectral region your instrument needs to measure or calibrate.
A broad calibration requirement may favor a source such as BIM-6212, while a measurement requiring several distinct visible mercury lines may be better suited to BIM-6250.
2. Spectral Line Requirements
Not every calibration task requires the same mercury wavelengths.
Check whether the available characteristic peaks correspond to the operating wavelength range of your spectrometer, detector, monochromator, or other optical instrument.
3. Lamp Pressure and Spectrum
Low-pressure mercury lamps generally provide more distinct characteristic lines, while higher-pressure lamps may provide stronger and more complex spectral output.
The appropriate option therefore depends on whether your priority is wavelength referencing, illumination intensity, or another optical requirement.
4. Optical Interface and System Compatibility
Consider how the light source will be coupled into the measurement system.
Fiber coupling, free-space optical output, detector sensitivity, numerical aperture, and instrument geometry can all affect the amount of usable light reaching the detector.
5. Mercury Lamp Power Supply
The mercury lamp power supply must match the electrical requirements of the selected light source.
For example, BIM-6212 uses a 12 VDC / 1 A adapter, while BIM-6250 operates from a 220 VAC power supply. Always confirm the electrical configuration before integrating the source into an optical measurement setup.
6. Calibration Purpose
For routine wavelength accuracy checks, broad-range calibration, or optical resolution verification, the best mercury light source may differ.
If you are unsure which configuration fits your instrument, provide Brolight with the wavelength range, spectrometer model, optical interface, and intended measurement task for product selection support.
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