HTC-2 Digital Thermometer & Hygrometer – Indoor/Outdoor Temperature & Humidity Meter with Clock and Alarm

HTC-1 Digital Hygrometer Temperature & Humidity Meter

Extech RH300-CAL Humidity Calibration Kit

Extech TP890 Thermistor probe (-4 to 158°F)

Extech RH522 Humidity and Temperature Probe