The Extech SDL200 is a versatile 4-channel data logging thermometer that accepts six thermocouple types (J, K, E, T, R, S) and also supports Pt100Ω probes for two-channel data logging. It records measurements directly onto an SD card in Excel format, facilitating easy transfer to a PC for analysis. The user-programmable sampling rate ranges from 1 second to 1 hour, accommodating various monitoring needs.

An offset adjustment provides a zero function for relative measurements, while the real date and time stamp on each record ensures accurate tracking. The instrument can manually store and recall up to 99 readings, and features MIN/MAX and Data Hold functions for enhanced usability. A wide temperature range with 0.1°/1° selectable resolution ensures precise measurements.

The SDL200 includes a built-in PC interface and an auto power off function with disable option. Its ability to log data from multiple thermocouple types and Pt100 probes simultaneously makes it ideal for laboratory, industrial, and HVAC applications where comprehensive temperature monitoring is required.