Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 270)

Model 9110TH NOx Analyzer Troubleshooting & Repair
Teledyne Analytical Instruments 250
Figure 7-18: 9110TH/M Sensor Assembly
Figure 7-19. 3-Port Reaction Cell Oriented to the Sensor Housing
4. Remove the two connectors on the PMT housing end plate facing towards the front
panel.
5. Remove the end plate itself (4 screws with plastic washers).
6. Remove the dryer packages inside the PMT housing.
7. Along with the plate, slide out the OPTIC TEST LED and the thermistor that
measures the PMT temperature.
8. Unscrew the PMT assembly, which is held to the cold block by two plastic screws.