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Ingress Protection (IP Code) Testing – IP33: Tool-Sized Object & Spray Water Protection

IP33 testing is a critical evaluation for assessing a product’s ability to prevent the intrusion of objects as small as 2.5mm, typically the size of small tools, and its capability to withstand water spray. This standard is especially important for products that operate in environments where they are subject to water sprays and the risk of small object penetration.

The IP33 rating is crucial in ensuring that these products remain functional and safe under such conditions, which is vital across various industrial, commercial, and residential applications.

As a certified IP Code testing laboratory, we realize the importance of IP33 testing. Meeting ingress protection compliance requirements can be difficult. Keystone provides the peace of mind that all of your needs will be met under one roof. Additionally, Keystone offers immediate emergency scheduling. 

Request a quote to learn why we are one of the fastest growing compliance test labs in the country. Ready to get started? We are. Contact us to see why so many companies work with us to achieve their environmental standard testing needs.

Summary of IP 33 Ingress Protection Testing

As part of the International Protection (IP) Marking system governed by the International Electrotechnical Commission (IEC), IP33 testing provides a standardized approach to classify the level of protection offered by electrical enclosures against external factors, including solid objects and liquids.

Specifically, the IP33 rating assesses the product’s resistance to 2.5mm tool-sized objects and protection from water sprays.

Understanding IP33 Testing

IP33 testing includes two key aspects of protection:

2.5mm Tool-Sized Object Protection (First Digit – ‘3’)

This testing evaluates whether the enclosure can prevent the entry of objects that are 2.5mm in diameter, such as small tools or thick wires.

Spray Water Protection (Second Digit – ‘3’)

This part of the test examines the product’s resistance to water sprayed at any angle up to 60 degrees from the vertical.

IP 33 Laboratory Testing Procedures

The methodology for IP33 testing is both rigorous and precise:

Test for 2.5mm Tool-Sized Object Protection: The test involves using a standardized object of 2.5mm diameter to try to penetrate the enclosure. The object must not be able to fully penetrate or make contact with any hazardous internal components.

Test for Spray Water Protection: The product is subjected to water sprayed from different angles, up to 60 degrees from the vertical. This test simulates scenarios such as rain or accidental water splashes, ensuring the enclosure can prevent water ingress that could damage the electrical components inside.

Importance of IP33 Testing

Enhanced Safety and Reliability

IP33 testing is crucial for ensuring products are safe from small tool penetration and water spray, thereby enhancing their overall reliability in various settings.

Consumer Confidence

Products that meet the IP33 standard reassure consumers and users of their durability and safety in conditions involving potential water exposure and physical contact.

Compliance with Safety Regulations

Adherence to the IP33 standard indicates a commitment to safety and quality in product design and manufacturing.

Applicability in Diverse Environments

The IP33 rating is essential for products used in environments where exposure to water spray and interaction with small tools is likely.

Industry Applications

IP33 testing is particularly relevant in:

Industrial Equipment and Machinery: Where machinery requires protection against small tools or objects and environmental factors like water spray.

Consumer Electronics and Appliances: In household and office environments, ensuring safety from small object intrusion and water exposure is crucial.

Commercial and Public Electrical Installations: For installations in areas where there’s a risk of exposure to water spray and access to non-technical personnel.

Expert IP 33 Ingress Protection (IP Code) Testing Laboratory

IP33 testing plays a crucial role in verifying that products are adequately protected against the intrusion of 2.5mm tool-sized objects and exposure to water spray. This level of testing is vital for ensuring the safety and functionality of electrical products under specific environmental conditions.

As technology advances, the significance and application of the IP33 standard will remain essential in assessing and ensuring product safety and reliability in diverse operational environments.

Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling. Our team strives to give our customers more time and energy on product development instead of testing. In addition to IP33 testing, we offer a full range of IP Code tests, from IP10 to IP69K, ensuring comprehensive coverage for all ingress protection testing standards.

Request a quote to receive testing services tailored to your specific requirements.


For similar tests to IP33, visit the following:

Ingress Protection (IP Code) Testing – IP03: Large Object & Spray Water Protection
Ingress Protection (IP Code) Testing – IP13: Large Object & Spray Water Protection
Ingress Protection (IP Code) Testing – IP23: Finger-Sized Object & Spray Water Protection
Ingress Protection (IP Code) Testing – IP43: Wire & Spray Water Protection
Ingress Protection (IP Code) Testing – IP53: Limited Dust Ingress & Spray Water Protection
Ingress Protection (IP Code) Testing – IP63: Dust-Tight & Spray Water Protection
Ingress Protection (IP Code) Testing – IP30: Tool-Sized Object Protection
Ingress Protection (IP Code) Testing – IP31: Tool-Sized Object & Drip Water Protection
Ingress Protection (IP Code) Testing – IP32: Tool-Sized Object & Tilted Drip Water Protection
Ingress Protection (IP Code) Testing – IP34: Tool-Sized Object & Splashed Water Protection
Ingress Protection (IP Code) Testing – IP35: Tool-Sized Object & Water Jet Protection
Ingress Protection (IP Code) Testing – IP36: Tool-Sized Object & Powerful Water Jet Protection
Ingress Protection (IP Code) Testing – IP37: Tool-Sized Object & Immersion Protection
Ingress Protection (IP Code) Testing – IP38: Tool-Sized Object & Extended Immersion Protection
Ingress Protection (IP Code) Testing – IP39: Tool-Sized Object & High-Temperature Water Jet Protection