Start with exposure, not the spec sheet. The most useful question is how much water the keyboard will actually meet. For sheltered console positions an IP65 unit such as the SL-86-911-TP is enough. For open decks, washdown areas and dockside terminals, choose IP66 with NEMA 4X, which resists powerful directed water. Where a keyboard may be briefly submerged or sits fully exposed, an IP68 model such as the SLK-880-FSR-OEM is the safe specification. Remember that NEMA 4X meets or exceeds IP66, so a NEMA 4X model quoted without a separate IP figure is sealed to at least that level.
Match the housing to the environment. Brushed stainless steel, as on the DT-102-SS and PM-72, shrugs off salt-laden air and physical knocks and wipes clean for hygiene-controlled areas. Sealed ABS polycarbonate, as on the SL-88-461 and AK-39, is lighter and keeps moisture away from the electronics for vehicle and wearable use.
Keep the pointing device and keys sealed. A Force Sensing Resistor or a membrane-covered touchpad keeps cursor control inside the sealed unit, so no separate mouse is exposed on a wet console. Glove-friendly silicone keys with real travel give a felt keystroke when hands are wet.
Confirm the temperature floor and the format. Most models run from -40C to +70C, but a few are narrower, so check the coldest condition the station will see. Then choose desktop, panel-mount, OEM or wearable to suit the installation. If you are unsure, our team will match a sealed model to the exact position.