What Is the Difference Between Water-Resistant and Waterproof?

Waterproof level The level of waterproof protection function, including building waterproof level, instrument and meter waterproof and dustproof level. It is mainly determined according to the nature, importance of the building, functional requirements for use, characteristics of the building structure and durability of the waterproof layer. The following situations were considered in classifying the waterproof level: After the leakage, it will cause huge losses until personal injury and death; After the leakage, it will cause significant economic losses; After the leakage, it will cause general economic losses; Leakage Will affect aesthetics.

waterproof level

The waterproof rating of the building should be determined by the designer when designing the waterproof, according to the nature, importance, and functional requirements of the building. Materials and construction

IPX IPX rating

The waterproof level of the electronic measuring instrument reflects the ability of the instrument to resist moisture and dust, especially for outdoor activities, which is inevitable in the harsh environment of high humidity or dust. Is crucial. To this end, the IEC529 standard has been formulated internationally. In order to comply with this, the waterproof protection of electronic equipment is divided into 10 levels in the Japanese Industrial Standard, which are respectively represented by IPX1, IPX2 ...

Meaning of protection class

0 no protection

1 Drip-proof I-shaped vertical drops of water have no harmful effects

2 Anti-drip type II Water droplets falling within 15 degrees of vertical direction have no harmful effects

3 Rain-proof type No harmful effects of rain within 60 degrees of vertical direction

4 Splash-proof type is not affected by water splash in any direction

5 Anti-spray type in any direction is directly affected by the spray of water without harmful effects

6 Water-resistant type can not be directly sprayed by water spray in any direction

7 Anti-immersion type will not enter the interior even if immersed in water under specified conditions

8 The water type can be used after being immersed in a certain pressure of water for a long time.

9 Moisture-proof type can be used even when the relative humidity is less than 90%

IPxx Waterproof rating IPxx rating

The international industrial standard waterproof grade IP and the Japanese industrial standard JIS waterproof grade are close, divided into 9 grades of 0-8, and the IP grade also stipulates dustproof.

Waterproof and dustproof

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 description below. In the level standard, ×× is a two-digit number, the first position indicates the protection level against solids, and the second position indicates the protection level against liquids. There are 7 levels of solid protection, which are represented by 0-6 respectively; 9 levels of liquid protection, which are represented by 0-8.

Dust level

0: No protection

1: Prevent large solids from entering

2: Prevents intrusion of medium-sized solids

3: Prevent small solids from entering

4: Prevent solid objects larger than 1mm from entering

5: Prevent the accumulation of harmful dust

6: completely prevent dust from entering

waterproof level

0: No protection

1: Water droplets have no effect on the shell

2: When the shell is tilted to 15 degrees, water droplets drip into the shell without effect

3: Water or rain has no effect from the 60 degree corner to the housing

4: The liquid is splashed into the shell from any direction without harm.

5: Rinse with water without any harm

6: Can be used in the cabin environment

7: Resistant to water immersion in a short time (1m)

8: Long time immersion in water under a certain pressure

Test method for waterproof rating

Example: The scale or display instrument is marked as IP65, which means that the product can completely prevent dust from entering and can be washed with water without any harm.

Regulations for waterproofing tests in IPxx ratings.

IPx 1

Method name: Vertical drip test

Test equipment: drip test device

Placement of the sample: Place it on the rotating sample table at 1r / min according to the normal working position of the sample. The distance from the top of the sample to the drip opening is not greater than 200mm.

Test conditions: dripping water is 10.5 mL / min

Duration: 10 min

IPx 2

Method name: 15 ° Drip Test

Test equipment: drip test device

Placement of the sample: make one side of the sample at a 15 ° angle to the vertical line, and the distance from the top of the sample to the drip opening is not greater than 200mm. After each test, one side was changed for another four times.

Test conditions: dripping water is 30.5 mL / min

Duration: 4 × 2.5 min (total 10 min)

IPx 3

Method name: Water spray test

experiment method:

a. Swing tube type water spray test

Test equipment: Swing tube type water spray 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. Place the sample on the sample table so that the distance from the top of the sample tube to the sample spray port is not greater than 200mm.

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

Test time: continuous water spray for 10 min

b. Sprinkler spray test

Test equipment: Hand-held water spray test device

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

Test conditions: A baffle with a counterweight should be installed during the test.

Test time: Calculated according to the surface area of the tested sample shell, 1 min per square meter (excluding installation area), minimum 5 min

IPx 4

Method name: Water splash test

experiment method:

a. Swing tube splash test

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

Test conditions: Except for the conditions mentioned below, it is the same as the above paragraph a of IPX 3. The water spray area is the water spray from the water spray holes in the 90 ° arc segments on both sides of the midpoint of the pendulum. The test sample is placed in the center of the semicircle of the swing tube. The swing tube swings 180 ° on both sides of the vertical line for a total of about 360 °. Each swing (2 × 360 °) about 12s

Test time: same as above (a) of IPX 3 (a).

b. Sprinkler splash test

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

Test conditions: Remove the baffle with balance weight installed on the equipment, the rest are the same as the above paragraph b of IPX 3;

Test time: Same as paragraph b of IPX 3 above, that is, calculated based on the surface area of the shell of the tested sample, 1 min per square meter (excluding installation area), 5 min minimum

IPx 5

Method name: water spray test

Test equipment: the inner diameter of the water outlet of the nozzle is 6.3mm

Test conditions: make the distance between the test sample and the water jet is 2.5m ~ 3m, and the water flow rate is 12.5 L / min (750 L / h)

Test time: Calculated based on the surface area of the shell of the tested sample, 1 min per square meter (excluding installation area), minimum 3 min

IPx 6

Method name: Strong water spray test;

Test equipment: the inner diameter of the water outlet of the nozzle is 12.5 mm

Test conditions: make the distance between the test sample and the water spray port 2.5m ~ 3m, and the water flow rate is 100 L / min (6000 L / h)

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

IPx 7

Method name: short-term immersion test

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

IPx 8

Method name: Continuous diving test;

Test equipment, test conditions and test time: agreed by the supply and demand (buying and selling) parties, and its severity should be higher than IPX 7.

Note: In addition, many outdoor electronics are emphasizing the ability to float.

Domestic standard for waterproof rating

QB / T 1898

--93

This standard applies to watches marked "waterproof", with or without additional overpressure marks, and not for diving watches. Significance: All watches marked "waterproof", with or without additional pressure markings, are waterproof in daily life, and can also be waterproof for short periods of time while swimming and under conditions of changes in water pressure and temperature Performance, however, they cannot be used for diving with or without additional overpressure markers. The technical requirements and test methods are as follows:

Resistance to air pressure Place the watch in air with an air pressure 2 × 105 Pa (2bar) higher than normal atmospheric pressure, and measure the air leakage rate into the case (tested with a special instrument). Air leakage rate is 50 g / min.

Resistance to water pressure Immerse the watch in a container filled with water and apply a pressure value equal to the overpressure mark within 1 minute. If the watch has no overpressure mark, the pressure value is 2 × 105 Pa (2bar) Hold for 10 minutes, and then reduce the pressure to the ambient pressure within 1 minute. Condensation test shall not be performed on the inner surface of the watch glass.

Water-resistance with a depth of 10 cm Immerse the watch in water with a depth of 10 ± 2 cm and keep it for 1 hour. Then do the condensation test. No condensation can occur on the inner surface of the glass.

The mechanical pressure resistance of the operating part. Immerse the watch in water with a depth of 10 ± 2 cm, and apply 5 Newtons in a direction perpendicular to the axis of the crown or button for 5 minutes. Then do the condensation test. No condensation can occur on the inner surface of the glass.

Resistance to changes in water temperature Sequentially immerse the watch in water with different depths of 10 cm: placed in water at 40 ° C for 5 minutes; placed in water at 20 ° C for 5 minutes; Take out and immerse it in another water temperature for no more than 1 minute). Then do the condensation test. No condensation can occur on the inner surface of the glass.

Standard description

This standard is equivalent to the international standard ISO 2281 "Waterproof Watches and Clocks" (1990 edition).

There are two schemes for the watch's waterproof performance test, and either one can be performed. A watch can only be called a waterproof watch after passing all the tests of one of the schemes. The first scheme: , , , ; the two schemes: , , , .

The waterproof performance of all kinds of waterproof watches is not graded. In addition to marking the watch with the term "waterproof", it can also use pressure (in Pa) as an overpressure mark (at least 2 × 105 Pa) or the depth of water (at least 20 meters). It is used for diving depth, but it is equivalent to the pressure value corresponding to the depth.

Popularization of knowledge about waterproof rating

In order to learn how to identify outdoor equipment, understanding of various technical data division is naturally essential. Today we will talk about the definition of IPX waterproof rating.

IPX is an internationally used waterproof certification system. Outdoor, diving, and many other instruments and equipment are used to mark the product's waterproof level, which is the most common technical indicator. Outdoor common equipment such as headlights, GPS, watches and other electronic-related instruments are usually labeled with IPX.

The IPX waterproof rating is divided into 8 levels, from IPX-1 to IPX-8, respectively. IPX-0 is indicated as completely non-waterproof. The following is a list of IPX waterproof ratings for your reference.

List of waterproof ratings

IPX-0 is not waterproof

IPX-1 equipment can provide waterproof protection equivalent to 3-5 mm / min rain for 10 minutes under normal operating conditions.

The IPX-2 level is basically the same as IPX-1, but it can pass a water resistance test of 15 degrees in all directions.

IPX-360-degree splash water protection provides a water-proof protection of 10 liters per second for 2-5 minutes and a pressure of 80-100n / m.

The IPX-4 level is basically the same as IPX-3, but it can provide all-round and angled splash and water protection.

IPX-5 waterproof protection at all angles and angles, providing a waterproof protection of 12.5 liters per second for 2-3 minutes and a pressure of 30n / m.

IPX-6 big wave waterproof protection, can last 2-3 minutes to resist a depth of 3 meters underwater, a flow rate of 100 liters / minute, a pressure of 100n / m.

IPX-7 can be immersed for 30 minutes at 1 meter underwater.

IPX-8 is completely waterproof and can be used continuously in water for a long time.

Generally speaking, we can reach IPX-7 level for outdoor equipment. Some products, such as tango safety boxes, can reach the level of IPX-8. When buying equipment in the future, we can use the IPX waterproof level list to refer to the range of use that the product can withstand.