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Ingress Protection (IP Code) Testing – IP31: Tool-Sized Object & Drip Water Protection

IP31 testing is crucial in assessing a product’s capability to protect against the entry of objects as small as 2.5mm, typically the size of small tools, and its ability to withstand vertical water drips. This testing is particularly important for products used in environments where they are exposed to potential water drips and the risk of intrusion by small tool-sized objects.

As a certified ingress protection testing laboratory, we realize the importance of IP31 testing. Meeting ingress protection compliance requirements can be difficult. We understand the challenges and guide companies through the process. Keystone provides the peace of mind that all of your needs will be met under one roof. When products do not meet the requirements, we assist with finding solutions.

Request a quote to learn why we are one of the fastest growing compliance test labs in the country. Contact us to receive more information on ingress protection certification testing.

Summary of IP 31 Ingress Protection Testing

The International Protection (IP) Marking system, administered by the International Electrotechnical Commission (IEC), includes the IP31 rating as a part of its classification system. This system rates the level of protection provided by enclosures of electrical equipment against external factors such as solid objects and moisture.

The IP31 rating ensures that these products can maintain their functionality and safety under such conditions, which is essential for various applications, including industrial, commercial, and residential settings.

The IP31 standard specifically addresses the product’s ability to prevent the intrusion of 2.5mm tool-sized objects and protect against vertical water drips.

Understanding IP31 Testing

IP31 testing involves two key aspects of protection:

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

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

Drip Water Protection (Second Digit – ‘1’)

This aspect of the test assesses the product’s resistance to water drips falling vertically.

IP 31 Laboratory Testing Procedures

The methodology for IP31 testing is detailed and precise:

Test for 2.5mm Tool-Sized Object Protection: The test involves using a 2.5mm diameter object, representing a small tool or wire, to attempt to penetrate the enclosure. The object should not fully penetrate the enclosure or come into contact with any hazardous internal components.

Test for Drip Water Protection: The product is subjected to water drips from above to simulate the effect of rain or condensation. The test checks if the enclosure can prevent water from entering and causing any damage to the electrical components inside.

Importance of IP31 Testing

Enhanced Safety and Reliability

IP31 testing is critical for ensuring that products are safe from small tool penetration and water drips, enhancing their overall reliability in various environments.

Consumer Confidence

Products that meet the IP31 standard reassure consumers and users of their durability and safety in conditions involving potential water exposure and physical contact.

Compliance with Safety Regulations

Adhering to the IP31 standard indicates a commitment to safety and quality in product design and manufacturing.

Applicability in Diverse Settings

The IP31 rating is crucial for products used in settings where exposure to water drips and interaction with small tools is possible.

Industry Applications

IP31 testing is particularly relevant in:

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

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

Commercial and Public Electrical Installations: For installations in areas accessible to the general public or non-technical personnel, where protection against water drips and small objects is necessary.

Expert IP 31 Ingress Protection (IP Code) Testing Laboratory

IP31 testing plays a vital role in verifying that products offer adequate protection against the intrusion of 2.5mm tool-sized objects and exposure to vertical water drips. This level of testing is essential for ensuring the safety and functionality of electrical products under specific environmental conditions.

Our team strives to give our customers more time and energy on product development instead of testing. Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling. In addition to IP31 testing, we offer a full range of IP Code tests, from IP10 to IP69K, ensuring comprehensive coverage for all ingress protection testing standards.

Have a question about our IP Code testing capabilities? Contact us or call (724) 657-9940 and we will determine the best course of action.


For similar tests to IP31, visit the following:

Ingress Protection (IP Code) Testing – IP01: Large Object & Drip Water Protection
Ingress Protection (IP Code) Testing – IP11: Large Object & Drip Water Protection
Ingress Protection (IP Code) Testing – IP21: Finger-Sized Object & Drip Water Protection
Ingress Protection (IP Code) Testing – IP41: Wire & Drip Water Protection
Ingress Protection (IP Code) Testing – IP51: Limited Dust Ingress & Drip Water Protection
Ingress Protection (IP Code) Testing – IP61: Dust-Tight & Drip Water Protection
Ingress Protection (IP Code) Testing – IP30: Tool-Sized Object Protection
Ingress Protection (IP Code) Testing – IP32: Tool-Sized Object & Tilted Drip Water Protection
Ingress Protection (IP Code) Testing – IP33: Tool-Sized Object & Spray 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