Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 302)

Model 9110TH NOx Analyzer Principles of Operation
Teledyne Analytical Instruments 282
8.5.3. PHOTO MULTIPLIER TUBE (PMT)
The 9110TH/M uses a photo multiplier tube (PMT) to detect the amount of
chemiluminescence created in the sample chamber.
PMT Housing End Plate
This is the entry to the PMT Exchange
PMT Preamp PCA
High voltage Power Supply
(HVPS)
PMT
PMT Cold Block
Connector to PMT
Pre Amp PCA
12V Power
Connector
Cooling Fan
Housing
TEC Driver PCA
PMT Heat Exchange Fins
Light from Reaction
Chamber shines
through hole in side
of Cold Block
Insulation Gasket
PMT Power Supply
& Aux. Signal
Connector
PMT Output
Connector
Thermo-Electric Cooler
(TEC)
PMT Temperature
Sensor
O-Test LED
Figure 8-17: PMT Housing Assembly