The HC2S3 temperature and relative humidity probe can be used for long-term, unattended applications.
It has a polyethylene filter that protects its sensor from fine dust and particles, and minimises water absorption and retention. Alternatively, a teflon filter is available for marine environments. The response time is slower when using the teflon filter.
Features include: accurate and rugged; mounts to a tripod or tower mast, crossarm or user-supplied pole; compatible with all Campbell Scientific data loggers (including the CR200(X) series).