SR4 Series Spectrometers

High SNR and Thermal Wavelength Stability

Versatile and robust, SR4 spectrometers offer high SNR and thermal wavelength stability for applications including plasma monitoring and reflection measurements. The spectrometer is anchored by a CCD-array detector and low-noise electronics for accurate, reliable results.

SR4 Series

Disclaimer: Wavelength range and optical resolution specifications are typical values. Actual performance may vary depending on configuration, selected components, and operating conditions.

Group	Part Number	Wavelength Range	Optical resolution (FWHM in nm)						Grating Groove Density (lines/mm)	Grating Blaze Wavelength	Available at Edmund Optics25 μm slit only
			5 μm slit	10 μm slit	25 μm slit	50 μm slit	100 μm slit	200 μm slit
UV-Vis options:	SR-4UVV300-XX	190 – 910 nm	1.17	1.25	1.65	2.55	4.62	9.24	600	300 nm	Buy Now
Vis-NIR options:	SR-4VN500-XX	350 – 1040 nm	1.17	1.25	1.65	2.55	4.62	9.24	600	500 nm	Buy Now
UV options:	SR-4UV220-XX	190 – 410 nm	0.42	0.46	0.60	0.93	1.68	3.36	1800	Holographic	—
	SR-4UV240-XX	190 – 535 nm	0.58	0.63	0.83	1.28	2.31	4.62	1200	Holographic	—
UV-Vis options:	SR-4UVV240-XX	190 – 850 nm	1.17	1.25	1.65	2.55	4.62	9.24	600	240 nm	—
	SR-4UVV400-XX	190 – 910 nm	1.17	1.25	1.65	2.55	4.62	9.24	600	400 nm	—
Ethernet options:	SR-4UVV300EN-XX	190 – 910 nm	—	—	1.65	—	—	—	600	300 nm	—
Vis options:	SR-4VIS400-XX	350 – 1040 nm	1.17	1.25	1.65	2.55	4.62	9.24	600	400 nm	—
NIR options:	SR-4N750-XX	570 – 860 nm	0.58	0.63	0.83	1.28	2.31	4.62	1200	750 nm	—
	SR-4N1000-XX	600 – 1050 nm	1.17	1.25	1.65	2.55	4.62	9.24	600	1000 nm	—
Extended-range options:	SR-4XR250-XX	190 – 1050 nm	1.43	1.54	2.03	3.13	5.67	11.34	500	250 nm	—
Extended-range Ethernet options:	SR-4XR250EN-XX	190 – 1050 nm	—	—	2.03	—	—	—	500	250 nm	—
Integration time		3.8 ms – 10 s
SNR (single scan @ 10 ms)		250:1
SNR (max. per second w/High Speed Averaging Mode)		3,000:1
Connectors		16 pin Samtec TFM, RS-232, SMA, USB Type-C
Physical dimensions		88.1 x 63.5 x 31.45 mm
Weight		254 g
Temperature (operation)		0 °C – 55 °C
Temperature (storage)		-30 °C – 70 °C
Best for		Absorbance at low stray light levels Emission line analysis in gases and plasmas High-resolution ethanol-water analysis in teaching labs and QA/QC environments where spectral detail is key Reflectance of solid samples