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b1 Space Pressure Monitors
b1 Remote Pressure Monitor
b1 Space Pressure Sensors
Room/Space Pressure Monitoring
Positive and negative room pressurization is very important for the control of airborne pathogens and particulate contaminants. Positive room pressurization isolates people or processes in a space from exposure to contamination from outside sources. Negative pressurization contains the contamination to the controlled space thus protecting people or processes outside. In most instances these positive or negative conditions must be constantly maintained.


Room Pressure Monitors
Paragon Room Pressure Monitors (SPM Series) are designed to monitor the pressure differential (positive or negative) between two rooms or spaces in a building and activate an alarm when the differential pressure deviates from the setpoint.

Paragon SPM Series sense true pressure to establish the differential, unlike other room pressure monitors that use thermal means or hot wires to measure air velocity through a "calibrated" passageway between the controlled and the reference spaces. Such systems only imply that a pressure differential exists. Paragon SPM Series use state-of-the-art industrial grade, high accuracy, ultra-low pressure sensing cells. This sensor technology assures exceptional accuracy and long-term stability. Paragon SPM Series are ultra-sensitive, stable and reliable, and are capable of measuring and alarming to within 0.25% of full scale and displaying the pressure to 0.0001 inches of water column (0.0249 Pascal). Therefore, the SPM Series can meet the most stringent requirements of hospital areas such as patient isolation rooms and operating rooms, as well as research facility laboratories, pharmaceutical sterile fill enclosures, semiconductor fabrication facilities and cleanrooms.

Each SPM consists of a controlled room pressure sensor, a reference room pressure sensor, and a room pressure monitor panel. The room and reference pressure sensors are designed to be installed in standard single gang electrical boxes usually placed in the room walls. The monitor panel is placed in the wall of either room in a flush mount electrical box (supplied only with the microprocessor based units [SPM-3000 and 4000]; a triple gang double deep electrical box should be supplied by others for the analog based units [SPM-1000 and 2000]). Standard 0.25 inch control tubing is run within the wall from the sensors to the monitor panel.

For the microprocessor based units (SPM-3000 and 4000), device monitoring and configuration can be performed by a building management system through either a LonWorks® or BACnet®-MS/TP communication network and through a local IR communication port using a laptop or Palm Tungsten E2® (or equivalent).

Unique feature include:
b2 True differential pressure sensing assuring no sensor fouling due to airborne particulate
b2 Ultra low pressure measurement down to one ten-thousandth of an inch water column (0.025Pa)
b2 High accuracy and long-term stability
b2 LonWorks® and BACnet® certified by an independent testing laboratory (SPM-3000 and 4000 only)
b2 Available in nine full scale ranges
b2 Positive and negative pressure monitoring
b2 LCD display for indicating differential pressure (standard on all units except SPM-3000 which includes this as an option)
b2 Audible local alarm and alarm acknowledge button
b2 Time delay to prevent nuisance alarms
b2 Integral six button touch pad for field configuration of engineering units, operating mode, operating range, process noise filtering, alarm set points, etc (SPM-4000 only)
b2 Analog output, linear to the room pressure, for remote monitoring and data logging purposes
b2 Form C SPDT relay for activation of a remote alarm
b2 Optional second room pressure monitoring and alarming (SPM-4000 only)
b2 Optional three-mode controller (P, I, 1/D) with door interlock feature programmable to either freeze controller output or bias output by a predetermined % F.S. value whenever a door into the room is opened (SPM-4000 only)
b2 Optional monitoring and alarming of room temperature, relative humidity, and airflow/air changes per hour (SPM-4000 only)
b2 Optional wash-down compliant to International Protection Rating Standard IP64B
Remote Pressure Monitor
Paragon’s Remote Pressure Monitor (RPM) is designed for indicating the differential pressure value and alarm status from multiple Room Pressure Monitors (SPM). The RPM can also be used to make global and individual SPM configuration changes such as high and low alarm setpoints, alarm delay value, operating mode, engineering units, etc. The Guardian RPM communicates with the individual SPMs through a dedicated twisted pair connection using BACnet®-MS/TP communication protocol. The Guardian RPM is typically located at the nurse’s station for hospital applications or at the facility maintenance office for laboratory applications. Unique features include:
b2 Backlit eight line graphics display for indicating differential pressure, room identifier, engineering units, and alarm setpoint values.
b2 Room pressure can be indicated in inch water column, Pascal, kiloPascal, or millimeter water column.
b2 Individual room LED to indicate normal and alarm status
b2 Audible alarm and global alarm acknowledge to all attached devices
b2 Remote configuration of networked SPM Room Pressure Monitors
b2 Device interconnection by twisted pair wire using BACnet® MS/TP communication protocol
b2 Automatic polling to determine number and type of devices attached
b2 Monitors from 1 to 24 SPM Room Pressure Monitors
b2 Flush mounted electrical panel, with brushed stainless steel front panel
b2 Key lock and password protected