The detectors SD1 to SD4, inclusive, can be supplied in a watertight case for taking measurements in very wet or soiled environments.
The SD1-SD4 as well as the SD7 detectors can be supplied in a watertight submersible enclosure (IP 66)
for use in very damp or dirty conditions. If there is a risk of condensation it can be ordered with a built-in 8.5 W heater. (Power supply 24 VAC.)
The casing cannot be supplied separately, as the detector must be fitted in the factory.