Compact USB-stick style logger that plugs directly into a computer for setup, then disconnects to record temperature and humidity readings independently at a user-selectable interval from 2 seconds up to 24 hours. It stores as many as 32,000 samples, has a bright LED that flags out-of-range alarm conditions, and ships with a wall-mount bracket for unattended long-term monitoring. This NIST variant is the same R6020 hardware supplied with a NIST-traceable calibration certificate for audit and compliance records.