10
Getting Started
Special Configurations
PC-Series pressure controllers are occasionally ordered with special
configurations to work in specialized ways:
Differential Pressure
PC-PSID Series pressure devices
monitor and control the differ-
ential pressure between two
points in the system. These
devices have two ports located
on the front face of the unit for
connection to two points in the
system where the differential
pressure is measured from. The
upstream port is for the higher
of the two pressures, and the
downstream port is for the lower
pressure. In these devices, the
flow path through the device is
not connected to either leg of
the differential pressure sensor.
A 15 PSI pressure controller with
differential pressure detector ports in
front, and a DB9 serial data connection.
Gas
Supply
Alicat
Controller
Process Port
Flow
Process
P2
P1 Sensor (no flow)
P2 Sensor (no flow)
P1
