Quality Grating made from Corning ULE (ultralow expasion) glass. 

Best spectrometer in its class. (SNR, readout noise, stray light, accuracy, stability). 

CCD-wise, TCD1304 perform better than SONY ILX511.

AHR02 ATHERMAL High Resolution Spectrometer, System is very stable, calibration is not needed in the lifetime. so you don't need to send the unit to re-calibration that can cost you up to  $350.  

190-1100nm range.

25um slit installed

SN: 02-3625. 

recently calibrated. 

Comes with manufacturer driver and GUI software. 

Tested and working.