Extech SDL500 Hygro Thermometer Data Logger

Amazon

Relative Humidity, Temperature, Dew Point, and Wet Bulb measurement Adjustable data sampling rate Stores 99 readings manually and 20M readings via 2G SD card Type K/J Thermocouple input for high temperature measurements Large backlit dual LCD display, Weight: 1.4550509292 pounds, Manufacturer: Extech

Test-meter.co.uk

Extech SDL500 Hygro-Thermometer/Datalogger. Measures humidity 5-95%, temperature 0-50°C. Type K/J thermocouple compatible. 20M data logging, Excel-ready SD card. 1-3600s sampling. 3-year warranty.