Extech RHT30 USB Humidity/Temperature Datalogger

Amazon

Triple LCD simultaneously displays three DC Current (mA) channels Datalogger date/time stamps and stores readings on an SD card in Excel format for easy transfer to a PC User can select the data sampling rate: 2, 5, 10, 30, 60, 120, 300, 600 seconds or Auto Long battery life (approx. 3 months) RHT35 has built-in barometric pressure MEMS sensor, Weight: 0.1 pounds, Manufacturer: Extech

Test-meter.co.uk

Compact USB datalogger. Monitors temperature (-30˚C to 70˚C) and humidity (0.1-99.9% RH). 48,000 data point memory. Integrated USB. PDF/Excel reporting. 3-month battery. 1-year warranty.