An IP33 rating is defined by IEC 60529. The first digit, 3, means the enclosure keeps out solid objects of 2.5 mm and larger, including tools and thicker wires, though smaller particles and fine dust can still enter. The second digit, 3, means it withstands water sprayed from any direction up to 60 degrees from the vertical.\n\nThis makes IP33 a good fit for sheltered settings rather than harsh ones:\n\n- Indoor installations and wall-mounted sensors\n- Covered or partly exposed outdoor locations\n- Spaces where occasional spray or light rain may occur, but not jets or immersion\n\nIP33 is not dust-tight, washdown-rated, or submersible, so avoid it for dusty industrial floors, high-pressure cleaning areas, or anywhere the device could sit in water.\n\nEnclosure rating matters because it determines where a LoRaWAN device can safely operate. Matching the IP rating to the real deployment environment prevents moisture and debris failures and helps ensure reliable long-term sensing.
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Frequently asked questions
What does IP33 mean?
Under IEC 60529, the first digit 3 means the enclosure is protected against solid objects 2.5 mm and larger, such as tools and thick wires. The second digit 3 means it is protected against water spraying at angles up to 60 degrees from vertical.
Is IP33 waterproof?
No. IP33 only guards against sprayed water up to 60 degrees off vertical. It is not protected against jets, heavy rain at steep angles, or immersion, so it is not waterproof or submersible.
Is IP33 dustproof?
No. The first digit 3 blocks solids 2.5 mm or larger but allows finer dust ingress. For dust-protected or fully dust-tight enclosures, look at higher first digits like 5 or 6.