Fisher C1 controllers and transmitters continue the
tradition of durable and dependable Fisher pressure
instrumentation while addressing air/gas consumption
concerns. The C1 is used wherever durable and
dependable pressure instrumentation is required. The
use of this product in demanding applications, such as
those found in chemical process, gas, and oil
production industries, demonstrates its versatility. The
C1 can reduce steady-state air/gas consumption to as
little as 1/10th that of previous products.
C1 controllers compare sensed process pressure (or
differential pressure) with an operator-adjusted set
point, and send a pneumatic signal to an adjacent
control element that maintains the process pressure at
or near the set point value. C1 transmitters sense
process variables and send out a pneumatic signal,
usually to an indicating or recording device that
directly indicates the process measurement.
Unless otherwise noted, all NACE references are to
NACE MR0175 / ISO15156 & NACE MR0103
