Sauermann KT320 Multifunction Datalogger Temperature Humidity Current Voltage Pulse with Smart Plug Probes is designed to datalog up to 2 million datapoints. The Sauermann KT320 can datalog temperature from the get-go using its internal sensors, but it can also datalog temperature, humidity, current, voltage, and pulse via optional external probes. The Sauermann KT320 features two-user configurable alarm set points, quick data transfer to PC, a convenient magnetic backing for quick and easy mounting, and more.