Data logging hygrometer

Testo 635-2 Multi-Function Thermo-Hygrometer with Data Logging and USB Interface

The Testo 635-2 is a multi-function thermo-hygrometer that measures air temperature, humidity, and dew point. It features data logging capabilities and a USB interface for easy data transfer to a computer.

Xiaomi Qingping BLE5.0 Digital Thermometer and Hygrometer with LCD Screen, Automatic Data Logging, White

Greisinger GMH 3351 Hygrometer with Data Logging Function (0% to 100% RH)

Chauvin Arnoux CA 1246 Digital Thermo-Hygrometer with Data Logging, Bluetooth Interface, Max 98% RH and +140 °F (+60 °C)

Indoor Outdoor Wall-Mounted Thermometer Hygrometer for Garden and Office Temperature Logging