90 Advanced User Guide
5 Detectors
Selecting an NPD jet
Open the oven door and locate the column connection fitting at
the base of the detector. It will look like either a capillary
optimized fitting or an adaptable fitting.
• If you have an application that tends to clog the jet, select a
jet with a wider tip id.
• When using packed columns in high column-bleed
applications, the jet tends to clog with silicon dioxide.
For capillary optimized fittings, select one of the following from
Table 18.
For the adjustable NPD, select one of the following from
Table 19.
Capillary optimized fitting
Adaptable fitting
Detector fitting
Adapter
Table 18 Jets for capillary optimized fittings
Figure 3 ID Jet type Part number Jet tip id Length
1 Capillary with extended jet
(recommended)
G1534-80580 0.29 mm (0.011 inch) 51.5 mm
2 Capillary G1531-80560 0.29 mm (0.011 inch) 43 mm
3 High-temperature G1531-80620 0.47 mm (0.018 inch) 43 mm
Figure 2 Capillary optimized NPD jets
1
2
3
12 3
43 mm
51.5 mm
43 mm
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