glass filter

Holmium Oxide

Part Number: 226-85009-02

Wavelength range: 240 nm to 640 nm

Usage: For wavelength analysis

Certificate: Certificate of Calibration and Traceability

Pack size: 1

Lead Time: 2 - 4 weeks

Glass filter containing holmium oxide, mounted stressfree in an anodised aluminium holder. As a solid material the holmium glass filter is physically more robust than the equivalent liquid cell, and can therefore be used in more demanding environments, making it especially useful as a routine wavelength check.

Sliding window covers are provided to protect the surface from damage when not in use. Variations from melt to melt of the glass can causesmall uncertainties in peak position

Each filter is individually certified.

Approximate peak wavelength values (in nm) are: 242, 279, 288, 334, 361, 419, 446, 454, 460, 537, 638


Material Part Number Wavelength range Usage
Didymium 226-85009-01 430 nm to 890 nm For wavelength analysis
Holmium Oxide 226-85009-02 240 nm to 640 nm For wavelength analysis
Didymium Oxide/Neutral Density 226-85009-21 430 nm to 890 nm For wavelength and absorbance analysis
Holmium Oxide/Neutral Density 226-85009-22 360 nm to 640 nm For wavelength and absorbance analysis


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