Enlake sells Thermochron Additional Logger Data Logger for Vaccine Fridges.
If you have more than one vaccine fridge, the Thermochron system comes into its own. Additional data loggers for vaccine fridges to be used with the Thermochron Starter Package are very inexpensive.
Vaccine Fridge Data Logger | Starter Kit | Thermochron
TinyTag Vaccine Fridge Data Logger
Vaccine Fridge with Data Logger | Liebherr Mediline LKV3913
Wireless Data Logger System
LogTag with built in USB | Data Logger
Bluetooth Temperature Data Logger | CX400
External Temperature Data Logger - TREX-8
LogTag USB Data Logger UTRIX-16
Tempmate Single-Use Temperature Data Logger
T-TEC Temperature Data Logger for Pt100 Sensor