Instructions for Use
– SCHMIDT
®
Flow Sensor SS 20.600
Page 4
2 Application range
The
SCHMIDT
®
Flow Sensor SS 20.600
(art. no.: 524 600) is designed
for stationary measurement of the flow velocity as well as the temperature
of pure
1
air and gas with operating temperature up to 120 °C and working
pressure
2
up to 40 bar.
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
3
w
N
(unit: m/s), based
on standard conditions of 1013.25 hPa and 20 °C. Thus, the resulting out-
put signal is independent of the pressure and temperature of the medium
to be measured.
When using the sensor outdoors, it must be protected against di-
rect exposure to the weather.
If the sensor head is immersed in water and operated under pres-
sure, the sensor may be damaged irreversibly.
Using the sensor in flammable gases the regulations of ATEX
guideline has to be applied (see below).
The sensor variants for use in potentially explosive atmosphere
(ATEX) and oxygen (O2) are not combinable.
Version ATEX
The ATEX version of the sensor is designed for use in explosive gas at-
mosphere of zone 2 (corresponding to EPL Gc) and explosive dust atmos-
phere of zone 22 (corresponding to EPL Dc).
ATEX-specific information can be found in the
“Supplementary instruc-
tions for use in explosive atmospheres ATEX
”.
The additional
ATEX instructions
(535698.02) must be read and
observed carefully when using the sensor in ATEX areas.
The operation in continuously or frequently occurring explosive
atmosphere is not allowed.
1
No chemically aggressive contents /abrasive particles; check suitability in individual cases
2
Overpressure
3
Corresponds to the actual velocity under standard conditions
