AMAZON multi-meters discounts
AMAZON oscilloscope discounts
One might be acquainted with the temperature-control
systems in large buildings such as the classrooms in a school. Many of
these control systems use pneumatic control (3-15 psi) to control the
opening and closing of water valves and dampers, which control the temperature and air flow to each room. If the building was built in the 1960s through
the 1980s it may still use this type of control. Newer control systems
may use a combination of the electrical (4-20 mA) with the pneumatic
(3-15 psi). If the system uses a combination of controls, it will use
pressure-to-current (P/I) converters or transmitters, or current-to-pressure
(I/P) converters. These types of control systems are also widely used
in process control systems and applications where large valves and actuators
are used.
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