Modules or Types:

Here are some available models of the Narrowband IR Filters optimized for gas detection

Code	CWL	HPBW	Tpeak(%)	Blocking(Tavg<1%)	Detected Gas
40702-001	2.00μm±20nm	44±10nm	≧80%	400-3200nm	CO2
40702-002	2.18μm±20nm	41±10nm	≧80%	400-3200nm	HF ref
40702-003	2.45μm±25nm	72±10nm	≧75%	400-20000nm	HF means
40702-004	2.89μm±20nm	54±10nm	≧75%	400-20000nm	H2O
40702-005	3.55μm±30nm	132±20nm	≧75%	400-20000nm	HCl
40702-006	4.72μm±50nm	90±10nm	≧75%	400-11000nm	CO
40702-007	5.25μm±50nm	100±10nm	≧75%	400-11000nm	NO
40702-008	5.46μm±50nm	102±10nm	≧75%	400-11000nm	SO2 ref
40702-009	6.25μm±100nm	124±10nm	≧75%	400-11000nm	NO2
40702-010	7.40μm±100nm	126±10nm	≧80%	400-10000nm	SO2
40702-011	10.6μm±200nm	1172±150nm	≧75%	400-12000nm	NH3

Note: Custom IR filters are also available upon request.

Narrowband Infrared Filters, or Narrow Band Pass IR Filters of North Optics, are oriented for transmitting a specific and narrow section of the IR spectrum centered around the designed center wavelength while blocking the remaining lights. Compared with broadband infrared filters, which are also available in North Optics, the transmission bandwidths of narrowband infrared filters are more limited. The substrate materials of North Optics's Narrowband Infrared (IR) Filters are selected from a diverse range including Si, sapphire, IR grade fused silica (such as Corning7979/SK-1310), Ge, and more, allowing for customized options to suit specific projects, enhancing compatibilities with various environments and applications. Selectable transmission bandwidths cover the entire IR wavelength spectrum from 0.9μm to 12μm. These filters feature high transmission within their designated bandwidths, enabling reliable and accurate manipulation of infrared signals, and meeting the demands of advanced technological applications like gas detection and semiconductor.