• Operating temperatures range of 32 to 122°F
  • Cable length 6ft (183cm)
  • Offloads full 64K logger in 30 seconds
  • Splash resistant

This product is an accessory for the following products:


The HOBO BASE-U-4 Optic USB Base Station and couplers are used to offload data from any HOBO® data logger with an Optic USB interface. The splash resistant Optic USB Base Station connects to your computer via USB, while connecting to the logger via an appropriate coupler. This is compatible with the HOBO UA, U20, U22, U23, UTBI, U24 & U26 series.

Couplers for all compatible loggers are included with the BASE-U-4. Couplers are included for compatibility with six of the most popular logger types including: UA Pendants, U20 water level loggers, the U22 Water Temp Pro v2, our UTBI TidbiT, U24 Conductivity and U23 loggers.