Waterproof ratings

IPX# waterproof specifications are specified on instruments and equipment. Below is a table of waterproof test level definitions based on the IEC 529 Specifications.

IPXY position of "X" being left (or zero) indicates that the unit has no special mechanical protection
IPYX If the the position of "X" was left (or zero) it would indicate that the unit has no special water protection.
Marine rated equipment is usually tested to IPX7.

Water Level Definitions

IPX-0-0	No special protection
IPX-1	Protected against falling water Equivalent to 3-5mm rainfall per minute for a duration of 10 minutes. Unit is placed in its normal operating position.
IPX-2	Protected against falling water when tilted up to 15 degrees - Same as IPX-1 but unit is tested in 4 fixed positions - tilted 15 degrees in each direction from normal operating position.
IPX-3	Protected against spraying water - Water spraying up to 60 degrees from vertical at 10 liters/min at a pressure of 80-100kN/m2 for 5 min.
IPX-4	Protected against splashing water - Same as IPX-3 but water is sprayed at all angles.
IPX-5	Protected against water jets - Water projected at all angles through a 6.3mm nozzle at a flow rate of 12.5 liters/min at a pressure of 30kN/m2 for 3 minutes from a distance of 3 meters.
IPX-6	Protected against heavy seas - Water projected at all angles through a 12.5mm nozzle at a flow rate of 100 liters/min at a pressure of 100kN/m2 for 3 minutes from a distance of 3 meters.
IPX-7	Protected against water immersion - Immersion for 30 minutes at a depth of 1 meter.
IPX-8	Protected against water submersion - The equipment is suitable for continual submersion in water under conditions which are identified by the manufacturer.