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Technical data
11.1 Technical data
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
185
Measuring conditions
Measuring conditions
Measurement path 0.3 ... 8 m (other lengths: please contact Siemens AG)
Process gas pressure, temperature  O
2
: 900 ... 1 100 hPa (absolute), 0 ... 600 °C
(32 ... 1 111 °F) - applies to MLFB code AB
 O
2
: 700 ... 5 000 hPa (absolute), 0 ... 200 °C
(32 ... 392 °F) - applies to MLFB code AC
 CO: 700 ... 2 000 hPa (absolute), -20 ... 300 °C
(56 ... 392 °F) ) - applies to MLFB code JC
 CO: 800 ... 1 200 hPa (absolute), -20 ... 700 °C
(56 ... 1 111 °F) ) - applies to MLFB code JC
Dust load The influence of a high dust load is complex, and depends on
the optical path length and particle size distribution.
Purging
Purging
Purging gas
● Quality
● Dew point
O
2
applications: nitrogen
CO applications: nitrogen, instrument air
O
2
applications: Purity better than 99.7 % in order to
achieve full performance. For oxygen measurements, an
oxygen content < 0.01 vol % in the purging gas is
recommended.
Instrument air: dry and oil-free
< -10 °C (14 °F), condensation on the optics must be avoided
Sensor purging

Max. overpressure in the sensor

Purging gas temperature on
sensor side
Flow
Purging on process side (optional)
 Pressure at purging gas inlet

Flow
500 hPa
0 ... +55 °C (32 ... 131 °F)
O2 application: After commissioning of a sensor enclosure
previously filled with air: 3 ... 5 l/min (for at least 15 minutes),
thereafter: min. 0.25 l/minute
2 000 ... 8 000 hPa
Depending on process gas pressure, process gas speed, dust
load, humidity etc.
up to 50 l/minute