Description Specication
Relative humidity 95 %
Mechanical environment resistance class 4M3 for industrial enclo‐
sure
• IEC 60068-2-64 test Fh: Ran‐
dom vibration
• IEC 60068-2-27 test Ea and
guidance: Impact
Climatic resistance class 4K4H
• IEC 60068-2-2 test B: Dry heat
• IEC 60068-2-1 test A: Cold
• IEC 60068-2-78 test Cab: Damp
heat, steady state
• IEC 60068-2-14 test N: Change
of temperature
EMC performance
• Emission
• Immunity
• EN 55011 / CISPR-11
• EN/IEC 61326-1 (Industry)
NAMUR
Table 7-28 Process medium conditions
Description Specication
Process medium tempeature within the acceptable temperature
range for the sensors
(-40to230°C for High Tempera‐
ture 991 sensors)
Fluid must be sonically conductive -
Operation outside the Reynolds transition region for best accuracy -
Table 7-29 Performance section
Description Specication
Approvals
• ATEX Zone 2
• IECEx Zone 2
• FM Class I Div. 2
• FMc Class I Div. 2
Accuracy ± 0.5 ... 1 % for velocities above 0.3
m/s and >10 diameters straight run
Repeatability ± 0.25 % (based on ISO 11631)
Pipe size range 12.7 ... 10 m (0.5 ... 394")
Wall Thickness Range 0.64 ... 76.2 mm (0.025 ... 3.0")
Pipe material Any sonically conductive material
(steel, plastic, aluminum, glass, ce‐
ment, ductile iron, copper)
Technical specications
7.9Operating conditions
SITRANS FS130 & FS230
Compact Operating Instructions, 12/2023, A5E38755607-AF 107