EXTECH SDL 200( 4-CHANEL THERMOMETER SD LOGGER)

4-Channel datalogging with 6 Thermocouple types ( J, K, E, T, R, S) and 2-Channel datalogging with RTD ( Pt100Ohm) probes
Displays [ T1, T2, T3, T4] or differential [ T1-T2] reading
Offset adjustment used for zero function to make relative measurements
Stores 99 readings manually and 20M readings via 2G SD card
Records readings with real date and time stamp
User programmable sampling rate: 1 to 3600 seconds
Min/ Max, Data Hold, Auto Power Off
Built-in PC interface
Complete with 6 AA batteries, four general purpose Type K bead wire temperature probes, SD card, and hard carrying case