What Is the Highest IP Rating?

1. Brief introduction

Waterproof grade The grade of waterproof protection function, including building waterproof grade, instrument waterproof and dust-proof grade.

It is mainly determined according to the nature of the building, the degree of importance, the functional requirements for use, the characteristics of the building structure and the service life of the waterproof layer.

The following situations are considered comprehensively when dividing the waterproof level:

①The leakage will cause huge losses, even personal injury.

②The leakage will cause significant economic losses.

③The leakage will cause general economic losses.

④ After leakage, it will affect the appearance.

The waterproof level of the building should be determined by the designer according to the nature, importance, and functional requirements of the building when conducting waterproof design. materials and construction design.

With the implementation of the new version of “Technical Specification for Waterproofing of Underground Engineering” GB50108-2008 in 2008 and the new version of “Technical Specification for Roofing Engineering” GB50345-2012 in 2012, the waterproofing level of construction engineering is divided into two types: the waterproofing level of underground engineering and the waterproofing level of roofing engineering.

(1) Underground engineering

The waterproof level of underground engineering is divided into four levels:

Level 1: No water seepage is allowed, and there is no wet stain on the surface of the structure.

Level 2: No water leakage is allowed, and there may be a small amount of wet stains on the surface of the structure.

Industrial and civil buildings: the total area of wet stains is not more than 0.1% of the total waterproof area, the area of a single wet stain is not more than 0.1 square meters, and the waterproof area of any 100 square meters is not more than 2.

Other underground works: the total wet stain area is not more than 0.2% of the waterproof area, the single wet stain area is not more than 0.2 ㎡, and any 100 ㎡ waterproof area does not exceed 3 places.

Among them, the tunnel project also requires that the average water seepage amount is not more than 0.05L / (㎡.d), and the water seepage amount on any 100-square-meter waterproof area is not more than 0.15L / (㎡.d).

Grade 3: There is a small amount of water leakage, and no wire flow and leakage of mud and sand are allowed.

The area of a single wet stain is not more than 0.3 square meters, the leakage volume of a single water leakage point is not more than 2.5L/d, and the waterproof area of any 100 square meters is not more than 7 places.

Grade 4: There are water leaks, and no line flow and mud sand leakage are allowed.

The average water leakage of the whole project is not more than 2L/(㎡.d), and the average water leakage of any 100 m2 waterproof area is not more than 4L/(㎡.d).

2. IP rating

The waterproof level of an electronic measuring instrument reflects the moisture-proof and dust-proof ability of the instrument, especially for outdoor activities, where it is inevitable to be in a harsh environment with high humidity or dusty sand. is crucial.

To this end, the IEC529 standard is formulated internationally.

In order to adapt to this, the waterproof protection of electronic instruments is divided into 10 grades in the Japanese Industrial Standard, which are represented by IPX1, IPX2… .

(1) The meanings of the types of protection levels are as follows:

0: No protection.

1: Anti-drip type I, water droplets falling vertically have no harmful effects.

2: Anti-drip type II, water droplets falling within a range of 15 degrees from the vertical direction have no harmful effects.

3: Rainproof type, no harmful effects of rainfall within 60 degrees of the vertical direction.

4: Splash-proof type, which is not harmfully affected by water splashing in any direction.

5: Anti-spray type, directly affected by water spray in any direction without harmful effects.

6: Water-resistant type, it will not enter the interior if it is directly sprayed by water in any direction.

7: Anti-immersion type, it will not enter the interior even if it is immersed in water under specified conditions.

8: Water type, it can still be used when immersed in water under certain pressure for a long time.

9: Moisture-proof type, can be used even in the humidity below 90% relative humidity.

(2) IPxx grade:

The international industrial standard waterproof level IP is close to the JIS waterproof level of the Japanese industrial standard, and it is divided into 9 levels from 0 to 8. The IP level also stipulates dust proof.

(3) dust proof and waterproof

The protection grade adopts the IP×× grade standard recommended by the International Electrotechnical Commission (IEC). Different installation places have different grades.

For details, please refer to the following description.

In the grade standard, “XX” is a two-digit number, the first digit indicates the degree of protection against solids, and the second digit indicates the level of protection against liquids.

There are 7 grades of solid protection grades, which are represented by 0-6.

There are 9 levels of liquid protection level, which are represented by 0-8.

(4) dust proof grade

0 : No protection.

1: Prevents the intrusion of large solids.

2: Prevents the intrusion of medium-sized solids.

3: Prevent small solids from entering.

4: Prevent objects larger than 1mm from entering.

5: Prevent harmful dust accumulation.

6: Completely prevent dust from entering.

(5) Waterproof grade

0 : No protection.

1: Water droplets dripping into the casing has no effect.

2: When the casing is tilted to 15 degrees, water droplets dripping into the casing has no effect.

3: Water or rain has no effect from a 60-degree corner to the shell.

4: The liquid splashed on the shell from any direction has no damage effect.

5: Rinse with water without any harm.

6: Can be used in the cabin environment.

7: It can withstand water immersion in a short time (1m).

8: Soak in water for a long time under certain pressure.

3. Testing method

(1) IPx 1

Method name: vertical drip test

Test equipment: drip test device

Sample placement: place the sample on the rotating sample table at 1r/min according to the normal working position of the sample, and the distance from the top of the sample to the drip port is not more than 200mm

Test conditions: drip volume of 10.5 mL/min

Duration: 10 min

(2) IPx 2

Method name: dripping test at 15° inclination

Test equipment: drip test device

Sample placement: Make one face of the sample at an angle of 15° to the vertical, and the distance from the top of the sample to the drip port is not more than 200mm. After each test, switch to another side, a total of four times.

Test conditions: drip volume of 30.5 mL/min

Duration: 4×2.5 min (10 min total)

(3) IPx 3

Method name: water spray test

experiment method:

①: Swing pipe water spray test

Test equipment: pendulum-type spray water splash test device

Sample placement: Select a swing tube with an appropriate radius, so that the height of the sample table is at the diameter of the swing tube, and place the sample on the sample table so that the distance from the top to the sample water jet is not more than 200mm, and the sample table does not rotate.

Test conditions: The water flow is calculated according to the number of water spray holes in the swing pipe, and each hole is 0.07 L/min. When water is sprayed, the water spray holes in the 60° arc sections on both sides of the midpoint of the swing pipe are sprayed to the sample. The sample to be tested is placed in the center of the semicircle of the pendulum tube. The swing tube swings 60° on both sides of the vertical line, a total of 120°. Each swing (2×120°) about 4s

Test time: continuous watering for 10 minutes

②: Nozzle water spray test

Test equipment: hand-held water splash test device

Specimen placement: Make the parallel distance from the top of the test to the nozzle of the hand-held sprinkler between 300mm and 500mm

Test conditions: baffles with counterweights should be installed during the test, and the water flow should be 10 L/min

Test time: calculated according to the surface area of ​​the shell of the tested sample, 1 minute per square meter (excluding installation area), at least 5 minutes

(4) IPx4

Method name: splash test

experiment method:

①: Swing tube splash test

Test equipment and sample placement: the same as the above paragraph a of IPX 3;

Test conditions: Except for the conditions mentioned later, it is the same as the aforesaid item a of IPX 3; The sample to be tested is placed in the center of the semicircle of the pendulum tube. The swing tube swings 180° on both sides of the vertical line, a total of about 360°. Each swing (2×360°) about 12s

Test time: the same as the above-mentioned item a of IPX 3 (i.e. 10 min).

②: Nozzle Splash Test

Test equipment and sample placement: the same as the above-mentioned IPX 3 paragraph b;

Test conditions: Remove the baffle plate with counterweight on the equipment, and the rest are the same as the above IPX 3 paragraph b;

Test time: the same as the above-mentioned item b of IPX 3, that is, calculated according to the surface area of the shell of the tested sample, 1 minute per square meter (excluding installation area), at least 5 minutes.

(5) IPx 5

Method name: water spray test

Test equipment: The inner diameter of the spray nozzle of the nozzle is 6.3mm

Test conditions: The distance from the test sample to the water spout is 2.5m ~ 3m, and the water flow is 12.5 L/min (750 L/h)

Test time: calculated according to the surface area of the shell of the tested sample, 1 minute per square meter (excluding installation area), at least 3 minutes

(6) IPx6

Method name: strong water spray test;

Test equipment: The inner diameter of the spray nozzle of the nozzle is 12.5 mm

Test conditions: The distance from the test sample to the water spout is 2.5m ~ 3m, and the water flow is 100 L/min (6000 L/h)

Test time: Calculated according to the surface area of ​​the shell of the tested sample, 1 minute per square meter (excluding installation area), at least 3 minutes

(7) IPx 7

Method name: short-time immersion test

Test equipment and test conditions: immersion tank. The dimensions should be such that the distance from the bottom of the sample to the water surface is at least 1 m after the sample is placed in the immersion tank. The distance from the top of the sample to the water surface is at least 0.15m

Test time: 30 min

(8) IPx8

Method name: continuous diving test;

Test equipment, test conditions and test time: To be agreed by the supply and demand (buyer and seller), the severity should be higher than IPX 7.

Note: In addition, many outdoor electronics are also emphasizing flotation capabilities.