Ingress Protection (IP) Rating

The IP Rating is an accepted engineering standard for defining the protection of electrical equipment from dust and moisture ingress.

For pressure sensors and associated instrumentation the 2 digit version of the IP rating is used to indicate how well the design will prevent dust and water getting into the electronic enclosure.
IP ratings are important indicators of how protected the external surface of a pressure transducer or digital indicator is going to be for a particular operating environment.

The higher the first digit of the IP rating number the better the protection from dust, sand or dirt particles penetrating the outer enclosure and damaging the internal components.

● 0 = No protection
● 1 = Protected against touch by hands (>50mm)
● 2 = Protected against touch by fingers (>12.5mm)
● 3 = Protected against tools and wires (>2.5mm)
● 4 = Protected against tools and small wires (>1mm)
● 5 = Limited dust ingress protection
● 6 = Total dust ingress protection

The higher the second digit of the IP rating number the better the ingress protection from water moisture leaking inside and corroding components or shorting out electrical & electronic circuits.

● 0 = No protection
● 1 = Protected against condensation
● 2 = Protected against water spray < 15 degrees from vertical
● 3 = Protected against water spray < 60 degrees from vertical
● 4 = Protected against water spray from any direction
● 5 = Protected against low pressure water jets from any direction
● 6 = Protected against high pressure water jets from any direction
● 7 = Protected against temporary immersion to at least 1m from bottom and 15cm from top of object
● 8 = Protected against continuous immersion to a specified depth or pressure