Airflow & Pressure Measurement
For applications requiring pressure &/or airflow measurement for control sequences or BAS monitoring,
Waddell offers several "stand-alone" products
for specialized applications.
Several technologies are suggested including:
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Differential Pressure
-
Thermal Mass Flow
-
Orifice Plate
Methods of installation include: probes and
probes installed in casings (flow stations)
with or without flow straighteners (honeycomb).
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Airflow & Pressure Measurement Products
Differential Pressure Probe (861)
The differential pressure probe is
designed with "enhanced"pressure
sensing which permis a wider
range of sensing. The primary tube measures
the impact pressure of the airstean & the
secondary tube amplifies that signal
by adding anarea of negative pressure.
Flow rates range from 250 ft/min.
Round or Rectangular Duct (862)
For stand alone airflow measurement the
862 model round or rectangular duct
will give repetitive results. The honeycomb
acts as airflow straighteners for less
than "ideal" applications.
Averaging Differential Pressure Probe (863/820)
The diamond shaped diffential pressure
sensor is an excellent choice for
accurate flow measuremant in confined
spaces. The flow is averaged by locating
the sensing points in four equidistant
locations within the ductwork. Additionally
a secondary tube is used to enhance the
air flow pressure.
Often very low space pressures must be
measured accurately eliminating the
influence of residual space velocities.
We offer a flush mounted pressure
sensor with two small integral pressure
chanmbers which reduce space pressures
to a steady accurate pressure signal.
Orifice Technology Airflow Station (865)
The "stand alone" orifice air flow station
meets several special air flow measuring
requirements. By measuring the pressure
drop accross an orifice no probes
or flow tubes are mounted in the air stream.
The orifice is large so it will not clog
if the air flow is contains foreign items.
Small Thermal Mass Flow Probe (868)
Our small thermal probe is ideal
when a wide range of airflow needs
measurement at a location remote
from our WPD damper.
Duct Mounted Mass Flow Probe (869)
The Thermal (Mass Flow) probe is often
applied where air flow rates vary widely
or where the density of the air
also varies.Flow rates range from
250 ft/min to 4000 ft/min & probe
lengths from 12" to 108".