Schmidt 521501, Instructions For Use Manual

Page: 4 / 36

Instructions for Use
– SCHMIDT
®
Flow Sensor SS 20.500 Page 4
2 Application range
The SCHMIDT
®
Flow Sensor SS 20.500 (article number 521501) is de-
signed for stationary measurement of the flow velocity as well as the tem-
perature of air and gas at working pressure of up to 10 bar
1 .
The sensor is based on the measuring principle of a thermal anemometer
and measures the mass flow of the measuring medium as flow velocity,
which is output in a linear way as standard velocity
2
w
N
, based on standard
conditions of 1013.25 hPa and 20 °C. Thus, the resulting output signal is
independent from the pressure and temperature of the measuring me-
dium.
The sensor has the following special features in connection with its unique
patented sensor tip design:
o
Omnidirectional measurement recording
o
High sensitivity (lower measuring threshold: 0.06 m/s)
o
High turn down ratio (max. measuring range: 50 m/s)
o
No undercuts
o
Sterilizability using hydrogen peroxide
3
, alcohols etc.
o
High soiling tolerance
o
High chemical media resistance
4
These features predetermine that the sensor is used, for example in:

Clean room

Flow channel or duct

Free-space application
When using the sensor outdoors, it must be protected against
direct exposure to the weather.
Mechanical versions
The sensor SS 20.500 is available in a version as compact sensor (probe
is fixed at housing) and as a remote sensor (the probe is connected with
its sensor housing via a cable).
The remote version is limited to atmospheric applications.
1
Only compact sensor; remote version is limited to atmospheric applications.
2
Corresponds to the actual velocity under standard conditions.
3
Use of hydrogen peroxide only with uncoated version.
4
Especially with optional coatings.
!
!