Herpstat Humidity

This humidity probe is compatible with the SpyderWeb series units and standard models that have version 5.0 firmware or greater.

All Herpstat 1 SpyderWeb
All Herpstat 2 SpyderWeb
Herpstat 1 (firmware 5.0 or greater)
Herpstat 2 (firmware 5.0 or greater)
Herpstat 4 (firmware 5.0 or greater)
Herpstat 6 (firmware 5.0 or greater)

Note:  To check firmware version on unit unplug it for ten seconds and plug it back in.  The unit will display the firmware version on startup.