An example of negative pressure is a bathroom with an exhaust fan. When the fan is
turned on, air is exhausted out of the room creating a slight negative pressure in the
bathroom compared to the hallway. This pressure differential forces air to flow from the
hallway into the bathroom.
The PresSura device informs the staff when the room is under proper pressure, and
provides alarms when the room pressure is inadequate. If the room pressure is in the
safe range, a green light is on. If the pressure is inadequate, a red alarm lights and
audible alarm turns on.
The PresSura controller consists of two pieces: a pressure sensor and a Digital Interface
Module (DIM). The pressure sensor is mounted above the doorway entrance to the
isolation room. Usually the DIM is mounted near the entrance to the isolation room or at
the nursing station. The pressure sensor continuously measures the room pressure and
provides room pressure information to the DIM. The DIM continuously reports the room
pressure and activates the alarms when necessary. PresSura Room Pressure Controller
is a continuous measuring system providing instant information on the room pressure.
Useful User Information
The DIM has a green light and red light to indicate room pressure status. The green light
is on when the room has proper room pressure. The red light comes on when an alarm
condition exists.
Sliding the door panel to the right reveals a digital display and keypad (Figure 2). The
display shows detailed information about room pressure, alarms, etc. The keypad allows
you to test the device, and program or change the device parameters.
Figure 2: Digital Interface Module (DIM)
PresSura controller has two levels of user information:
1. PresSura controller has a red light and green light to provide continuous
information on room pressure status.
2. PresSura controller has a hidden operator panel providing detailed room
status information, self-testing capabilities, and access to the software
programming functions.
NOTE: The unit provides continuous room pressure status through the red and green
light. The operator panel is normally closed unless further information on room
pressure status is needed, or software programming is required.
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