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The IP65 rating means that the enclosure can only provide protection against low pressure water jets (6.3mm). To test IP65 enclosures, the water jets must be subjected to 12.5 liters of water volume per minute for at least 15 minutes at a pressure of 30 kPa at a distance of 3 meters. Figure 2 shows an IP65 rated enclosure.
An IP66 rated enclosure provides protection against high pressure water jets (12.5mm). During the test procedures, the enclosure is subjected to 100 liters per minute of water volume at a pressure of 100 kPa at a distance of 3 meters for at least 3 minutes.
The IP67 rating means that the enclosure provides protection against immersion up to 1 meter. The test method for such enclosures includes immersion at a depth of at least 1 meter for 30 minutes or more. The depth of immersion is measured from the bottom of the object and should be at least 15 cm from the top of the object.
Is IP68 submersible?
IP68 provides total protection against dust ingress and immersion at greater depths and higher pressures. However, the terms "greater depths" and "higher pressures" can be vague. Therefore, the IP68 specifications must be the same for the manufacturer and the user. And that depends on their requirements and the application. However, the IP68 rating provides protection against immersion at a depth of at least 1 meter.
What is IP69K?
IP69K provides complete protection against ingress of dust and targeted water jets of high temperature and pressure. It is typically used in high rinsing environments, such as food and beverage processing industries. There, high temperature and pressure are important during cleaning procedures to maintain hygiene and purification levels. IP69K is the highest IP protection degree.