Q: Why do your sensors have both IP and NEMA ratings?
A: Both IP and NEMA ratings determine how well enclosures for electronic components resist the infiltration of dust and moisture. IP (Ingress Protection) ratings for non-hazardous locations were developed by the IEC and are primarily used in Europe and Asia. NEMA ratings were developed by the National Electrical Manufacturers Association and are primarily used in the US. We test our sensors to both rating systems simultaneously in order to satisfy our customers’ regional requirements.
Q: Why aren’t all Banner sensors water and dust-tight?
A: Not all sensors need to withstand rigorous environments. For example, if we were to design all our sensors to meet IP67, it wouldn’t be cost effective for a customer who needed an unsealed sensor. We give our customers as many choices as we can so that they can best solve their application.
Q: What do the numerals following the "IP" stand for?
A: The rating system is identified by the letters IP followed by two numerals, as in IP67. The first numeral represents the degree of protection against the ingress of dust and other solid objects. The second represents the degree of protection against the ingress of water. Usually the more harsh the environment, the higher the numbers used. Refer to this chart for the meaning of these numerals.
Q: Are only enclosures given IP and NEMA ratings?
A: Yes. Only the enclosure (the sensor housing) is tested to rate how well it protects against the ingress of solids or liquids. The IP69K sensors that we offer have quick disconnect cables as some of the regular integral cabling can be damaged by the high-pressure spray.
Q: For how long will my IP68 sensor function while under water?
A: Keep in mind that the IP ratings signify whether a sensor enclosure meets the ingress protection required of the particular rating. IP and NEMA ratings do not describe a sensor’s ability to function.
That said, IP68 is a manufacturer-specified test, meant to be more stringent than IP67. Banner-defined IP68 means that a sensor should not leak for a minimum of 24 hrs of continuous submersion at 2 meters of water. However, moisture ingress by itself does not guarantee sensor malfunction. Contact Banner directly for specifics about particular products with the IP68 rating.
Q: Does Banner test all of its sensors and electronic components?
A: To get an IP rating, Banner tests sensors by housing type rather than every single sensor.
Q: Will an IP69K sensor function even when being blasted by water jets?
A: It will continue to function however, it is very likely water would cause too much interference for the sensor to perform accurately. The IP69K rating simulates a cleaning cycle using high pressure water spray. Customers usually do not operate their machine or process while cleaning.
Q: What does the “K” stand for in IP69K?
A: IP69K is a rating that is not included in the IEC 60529. At present, it can only be found in the DIN standard 40050-9 and in this standard, the suffix “K” signifies high pressure. This means that sensors rated at IP69K are protected against the effects of high-pressure water.
Q: How do you test your equipment to determine if it’s IP69K?
A: With IP69K, we spray a sensor with water at 1500 psi at 4” to 6” from the sensor. The water used is at 176°F and is blasted at the rotating sensor for 30 seconds from 4 angles (120 seconds in total). The water has a flow rate of 4 gallons/minute. After testing, the sensor is inspected to determine if there is any water inside.
Q: Does the IP69K rating mean that the sensor has met IP67 and IP68 as well?
A: Not necessarily. IP69K sensors are able to withstand a high-pressure water jet, but may not be able to withstand submersion. IP69K sensors do not have to automatically comply with IP67 and IP68 ratings, but all Banner products which are IP69K rated are tested to at least 1 m submergence in water.