Spectrex Quasar 900 Open-Path Gas Detection System - Manual (Page 22)

SafEye TM Quasar 900 Gas Detector
10 Description
2.6.1 Flash Source Unit
The Flash Source unit emits IR radiation pulses at the rate of two pulses per
second. The pulse width (5-10µsec) is very powerful. The front of the
source SafEye has a lens that collimates the IR beam for maximum
intensity. The front window is heated to improve performance in icing,
condensation and snow conditions.
There are four source types:
 For Short Range –901 – source P/N QT-X-11X
 For Medium Range 1- 901 – source P/N QT-X-21X
 For Medium Range 2- 903 – source P/N QT-X-31X
 For Long Range - 904 – source P/N QT-X-41X
1 Front Window Section 6 Back Cover
2 Label 7 Earth Terminal
3 Main Housing 8 Front Window
4 Mounting Plate 10 Cable Inlet
5 Junction Box 11
Indication Led
Figure 2: Flash Source
The sources for models 901, 902 and 903 are the same electronically and
optically. The only difference is in the apparatus
The source for model 904 has different optics with different XENON lamp
source.