2.6.2 Detector Unit (Figure 2). SMC Open Path Combustible Gas Detector Quasar 900

Spectrex Inc. - SafEye

TM

Quasar 900 Gas Detector Manual – TM 888200, Rev. F, February 2013

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.

2.6.2 Detector Unit (Figure 2)

The Detector receives the transmitted pulsed radiation signals from the Flash

Source. The signals are then amplified and fed into an analog to digital signal converter to be processed by the internal microprocessor. When the signals drop below a prescribed level, the internal microprocessor will compensate for them.

This will allow the signal to be maintained even in severe weather conditions. The data is sent to the output interface section.

The front window of the Detector is heated to improve performance in icing, condensation and snow conditions.

There is one detector type that is suitable for all Quasar models 901, 902, 903 and 904 – P/N QR-X-11X.

1 Front Window Section 7 Earth

2 Label

Plate

Box

10 Cable Inlet

11 Indication Led

Figure 2: Detector

11