Understanding Ingress Protection (IP) Ratings
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Two-digit ingress protection (IP) ratings are defined by the IEC 60529 standard and specify the degree to which an environmental enclosure protects against the intrusion of solid particles (represented by the first digit) and water (represented by the second digit).
Many measurement and control applications extend beyond the controlled environment of a lab or research facility. In particular, remote or wireless measurement equipment, such as NI Wi-Fi data acquisition (DAQ), is often located in harsh outdoor or industrial environments. IP enclosures can protect sensitive measurement equipment in such applications. Refer to the following table for a complete list of IP enclosure ratings and their meanings.
| Protection Against Solid Objects | Protection Against Water | ||
|---|---|---|---|
| First Number | Description | Second Number | Description |
| 0 | Not protected | 0 | Not protected |
| 1 | Protected against objects greater than 50 mm | 1 | Protected against vertically dripping water |
| 2 | Protected against objects greater than 12.5 mm | 2 | Protected against direct sprays up to 15 deg from vertical |
| 3 | Protected against objects greater than 2.5mm | 3 | Protected against direct sprays up to 60 deg from vertical |
| 4 | Protected against objects greater than 1 mm | 4 | Protected against direct sprays from all angles |
| 5 | Dust-protected (no harmful deposit) | 5 | Protected against low-pressure water jets |
| 6 | Dust-tight | 6 | Protected against high-pressure water jets |
| 7 | Immersible in water up to 1 m | ||
| 8 | Immersible in water beyond 1 m | ||
Ingress Protection (IP) Ratings
National Instruments IP Enclosures
Two new IP enclosures for NI Wi-Fi DAQ devices provide a minimum of IP 54 protection, preventing entry by dust particles and rain (spraying water). The low-cost NI 9921 enclosure offers rubberized glands for passing I/O signals through to a WLS-9xxx device mounting inside and an external antenna for communication to a host PC. The NI 9922 enclosure features an additional Ethernet port and a 4-pin trigger connector, all sealable against the environment.
Figure 1. The NI 9922 IP 54 enclosures provide protection for NI WLS-9xxx devices from water and dust in outdoor or other harsh environments.
| Device | Part Number | Description |
|---|---|---|
| NI 9921 | 196646-01 | Outdoor enclosure for NI WLS-9xxx DAQ devices, basic |
| NI 9922 | 193406-01 | Outdoor enclosure for NI WLS-9xxx DAQ devices, with Ethernet and trigger connectors |
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