This is the diagram I used to connect this temp probe DROK DS18B20 Temperature Sensor 
I too am using the ‘Fibaro Z-Wave FGK-101 Temperature & Door/Window Sensor’ Full Support Handler.
Works perfectly. I have it wrapped in plastic wrap and inserted into a Gatorade bottle upside down next to my pool skimmer to read pool temp and trigger heater and pump on off using Virtual Switch in various Automations.