Agilent Technologies 6890 Series - Internal;External Plumbing: TCD Without EPC; Internal;External Plumbing: ECD Without EPC

Flow and Pressure Control Part 2. NonEPC control
Detectors
74
Internal/external plumbing: TCD without EPC
This detector has two internal pressure regulators, one for reference gas and
one for makeup gas, that are supplied from a single fitting. The pressure
regulators are located behind the detector positions.
Figure 13 TCD without EPC
See the Detectors volume for flow rate details.
Internal/external plumbing: ECD without EPC
This detector has an internal pressure regulator that supplies both the anode
purge gas and the makeup gas. The pressure regulator is located behind the
detector positions.
Reference and
make up in
INTERNAL
pressure
regulators
Keyboard-controlled
On/off solenoid
valves Restrictors
Reference
switching
valve
TCD
Makeup flow
6890 GC
EXTERNAL
pressure
regulators