Skip Navigation Links.
Protective levels against solid foreign substances Protective levels against water
First index no. Brief description Definition Second index no. Brief description Definition
0 Not protected 0 Not protected
1 Protected against
solid foreign objects
of 50 mm and larger
The object probe,
a sphere of 50 mm in diameter,
must not fully penetrate.
1 Protected against
dripping water
Drops which fall vertically must not have any harmful effect.
2 Protected against
solid foreign objects
12.5 mm in diameter and larger
The object probe,
a sphere of 12.5 mm in diameter,
must not fully penetrate.
2 Protected against dripping water
if the housing is inclined by up to 15°.
Drops which fall vertically must not have any harmful effects
if the housing is inclined at an angle of up to 15° of either side of the perpendicular.
3 Protected against
solid foreign objects
2.5 mm in diameter and larger
The object probe
of diameter 2.5 mm
must not penetrate at all.
3 Protected against spray water Water which is sprayed at an angle of up to 60° of either side of the perpendicular must not have any harmful effects.
4 Protected against
solid foreign objects
1.0 mm in diameter and larger
The object probe
of diameter 1.0 mm
must not penetrate at all.
4 Protected against
splash water
Water which is splashed against the housing from all directions must not have any harmful effects.
5 Dustproof The ingress of dust is not fully prevented;
however, it must not penetrate to such an extent that
satisfactory operation or safety are impaired.
5 Protected against
water jets
Water which is sprayed in a jet against the housing from any direction must not have any harmful effects.
6 Dust-tight No penetration of dust. 6 Protected against
strong water jets
Water which is sprayed as a strong jet against the housing from any direction must not have any harmful effects.
7 Protected against
the effect of temporary submerge into water
Water must not penetrate to an extent that will cause harmful effects if the housing is temporarily submerged in water under pressure and under time conditions.
8 Protected against
the effect of permanent immersion in water
Water must not penetrate to such an extent that it will cause harmful effects if the housing is permanently submerged in water.
9 Protected against
water jets from a high-pressure cleaner
IP x9K according to DIN 40050
Water jet at 0°, 30°, 60° and 90°
Cycle: 30<\!s>seconds each
Distance: 10 - 15 cm
Water volume: 14 - 16 litres per minute
Water temperature: 80<\!s>°C +/- 5<\!s>°C
Water pressure: 80 -100 bar