Data Sheet for Product

Technical Specification Sheet
Rev. 2, April, 2001
Document No. 149-293P25
Page 1 of 4
Fume Hood Monitor
Figure 1. APOGEE Fume Hood Monitor.
The APOGEE™ Fume Hood Monitor* (FHM) is a
laboratory fume hood safety device which provides
continuous measurement and display of fume hood
face velocity. The Fume Hood Monitor is the only
device available packaged with a service program to
install it, start it up, and calibrate it in accordance with
laboratory and fume hood performance listing
guideline.
The FHM alerts the Fume Hood user with an audible
and visual alarm in the event of a fume hood exhaust
system failure. It is designed to operate as a
standalone monitor and as an integral networked
component of the APOGEE Automation System to
ensure user safety of constant volume fume hoods.
The FHM utilizes through the wall, thermal
anemometer velocity measurement technology. The
sensor, mounted within the FHM electronic assembly,
measures the velocity of the airflow moving through
the fume hood via a sampling tube connected to the
fume hood wall.
*Patent No. 5439414
The location of the sample tube is critical to the proper
operation of the monitor. The Fume Hood Evaluation
Kit, part number 546-00320 will aid an installer in
locating the proper location of the sample tube to
obtain an accurate velocity measurement. This
velocity measurement is calibrated to match the
average velocity of air moving through the sash face
opening.
Local user alarms for high and low face velocity
provide visual and audible annunciation whenever the
measured face velocity exceeds the user defined
alarm limits. The emergency push-button allows the
user to annunciate an emergency condition at the
fume hood such as a chemical spill. All alarms can be
sent out over the APOGEE network or to a remote
alarm horn via the integral digital output (DO) point.
For fume hood exhausts that are turned off or setback
during unoccupied hours, the FHM provides an
unoccupied mode, which can be set via a local switch
and over the APOGEE network. The unoccupied
mode eliminates unnecessary alarms when the
laboratory is not is use.
The FHM also has an integral digital input (DI) point
which provides additional features at the fume hood
such as monitoring the sash height, initiating an
auxiliary alarm, or connecting to a remote
occupied/unoccupied switch.
Networked Fume Hood Monitors throughout your
entire facility are integrated to a central safety or
maintenance workstation (see Figure 2) to ensure
immediate response to critical alarms and to
continuously archive fume hood-operating conditions
for regulatory compliance.