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SM540 High Resolution Spectrometer

The Choice for High Resolution Spectral Applications


- Optical input direct to slit or via fiber
- Allows higher resolution spectral measurements in up to a 700nm measurement window between 200 - 1050nm, double the resolution of the SM2xx/SM4xx series by narrowing the covering wavelength range in half 
- USB 2.0 interface with 16-bit dynamic range available
- Support up to 8 USB multi-channel configuration
- UV enhancing coating


The SM540 is a CCD-based spectrometer that offers more than double the resolution of the SM440. This resolution is achieved using oversized (30mm x 30mm) optical-bench components. These components offer approximately four times the effective collimation, grating, and focusing area than what is used in the SM400 and SM440. As with all spectrometers, effective resolution increases as window size decreases. A 100 nm window will have approximately 0.05nm resolution (as opposed to 0.15nm for the SM400 and SM440). The larger optical bench of the SM540 makes it possible to have a narrow window size in NIR and get a higher resolution, which is impossible in the smaller optical benches like the SM400/SM440 due to the limitation of the grating diffraction angle. The standard interfaces include a USB 2.0 interface with a 16-bit extended dynamic range. Our USB board can support multichannel configurations up to 8. With this multichannel configuration, a high resolution for a wide range or a dual spectrometer system (one for measurement and the other for reference) is possible. Spectral Products applies a new UV enhancing coating on the CCD to increase the UV sensitivity below 450nm compared with the conventional UV coating that is widely used in CCD spectrometers. With the help of this new UV coating, the signal sensitivity below 500nm can get improved ~20-50% more in general. Software support includes an SDK and DLLs for dedicated applications development and our SM32Pro Windows-based spectral acquisition and analysis software. Both standard and legacy interface designs provide support for advanced acquisition programming and external triggering.

NOTE: Please click SM540 for the brochure file.


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SM32Pro & SMProMX - Windows (32-bit/64-bit) based software for data acquisition and analysis

- Transmission, reflectance, and absorbance measurements

- Data export, zoom in and out, spectrum overlays, and many more features

- Color analysis tools included

- Signal average and integration time control

- DLL libraries available for easy user software development

- VC++ / VB / LabView / Matlab examples available




Toshiba TCD 1304

Pixel: 3648
Sensing Pixel size: 8µm x 200µm
Sensitivity: 160 V/(lx s) under daylight fluorexcent illumination

Spectral Resolution

0.1 to 10nm depending on the slit and grating choices

Spectral Range

200 - 1050nm

Spectrograph f#


Fiber Coupler

SMA 905 or FC standard

Stray Light

0.1% overall

Slit Options

5, 10, 25, 50, 100, 200, 400µm

Orders Sorting Filter

Longpass filter or linear variable filter installed per wavelength coverage

Computer Interface

USB 1.1 / 2.0 16-bit 500KHz (support up to 8 multi-channel configuration)


Windows 98/Me/2000/XP/VISTA/Win7/Win8.1/Win10 (both 32/64bit)
SM32Pro & SMProMX (free with spectrometer)
Includes DLL libraries and SDKs for easy custom application development


7 x 6.75 x 3 inches

(17.78 x 17.15 x 7.62 cm)



Dark Noise RMS

< 50 RMS counts in 16bit @35msec integration time

Signal to Noise Ratio


min. Integration Time


Trigger mode

Free Run Mode
External Trigger Mode