IR Filters For Gas Analysis

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Gas analysis applications
Spectrogon manufactures a standard selection of infrared filters designed for measuring various gases, such as CO, CO₂, and SO₂.

Custom sizing
Dicing or turning down (of the diameter):
Please refer to our dicing prices page.

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The table below is a product list and does not indicate stock quantity. Please contact the sales department for stock info, or if you don’t find a suitable filter for your application.

Click on the description to see spectral characteristics.

Description	CWL	CWL +/- tol	HW	HW +/- tol	T (%)	Gas	Substrate	Blocking (nm)
BP-3050-100 nm	3050	± 30	100	± 20	70	C₂H₂	Sapphire	30 000
NB-3275-080 nm	3275	± 20	80	± 20	70	HC	Sapphire	30 000
NB-3355-040 nm	3355	± 20	40	± 10	70	C₂H₆	Sapphire	30 000
BP-3400-120 nm	3400	± 30	120	± 20	70	HC	Sapphire	30 000
BP-3400-120 nm Si	3400	± 30	120	± 20	70	HC	Silicon	11 000
NB-3910-070 nm	3910	± 30	70	± 15	70	Ref	Silicon	11 000
BP-4265-200 nm	4265	± 30	200	± 20	70	CO₂	Sapphire	30 000
NB-4265-120 nm Si	4265	± 30	120	± 20	70	CO₂	Silicon	11 000
NB-4525-083 nm	4525	± 20	83	± 6	70	N₂O	Sapphire	30 000
NB-4525-083 nm Si	4525	± 20	83	± 6	70	N₂O	Silicon	11 000
BP-4650-180 nm	4650	± 40	180	± 20	70	CO	Sapphire	30 000
BP-4650-180 nm Si	4650	± 40	180	± 20	70	CO	Silicon	11 000
NB-4720-090 nm	4720	± 20	90	± 10	70	CO	Sapphire	30 000
NB-4720-090 nm Si	4720	± 20	90	± 10	70	CO	Silicon	11 000
NB-5680-165 nm	5680	± 40	165	± 30	60	H₂O	Sapphire	30 000
NB-5680-165 nm Si	5680	± 40	165	± 30	70	H₂O	Silicon	11 000
NB-6250-100 nm	6250	± 40	100	± 30	70	NO₂	Silicon	11 000
BP-6580-200 nm	6580	± 40	200	± 20	70	H₂O	Silicon	14 000
NB-7300-180 nm	7300	± 50	180	± 20	70	SO₂	Silicon	11 000
BP-7675-242 nm	7675	± 50	242	± 30	70	CH₄	Silicon	12 000
BP-10540-690 nm	10540	± 100	690	± 100	70	SF₆	Ge	16 500
BP-10540-690 nm Si	10540	± 100	690	± 100	60	SF₆	Silicon	16 500

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Central wavelength (CWL)

+/- nm

Half band width (HW)

+/- nm

Immediate requirement (pcs) *

Estimated yearly requirement (pcs)

Transmittance (min/max) (%)

Transmittance range (nm)

Blocking, range (nm) *

Blocking, level (% of outbound)

Angle of incidence (dgr)

Specification temperature (dgrCelsius)

Size (mm) *

Size tolerance (+/- mm) *

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