Table of Contents
Advertisement
Duct pressure switches and sensors
Installing differential pressure probes for air
A - Control a filter (clogging)
B - Control a fan (upstream/downstream)
C - Measurement of difference in pressure between two ducts
D - Measurement of difference in pressure between two rooms or
of inside of duct and outside
Basic principles
Measuring static pressure(i.e. pressure exerted by air on pipe
Measuring dinamic pressure
Legend
y
Kg/m3, specific weight of air
q
m/s, air speed
g
9.81 m/s2 gravity acceleration
Pd
mm C.A., dynamic pressure
Measuring total pressure
22
walls)
Advertisement
Table of Contents
