The TM-947SD is a multifunctional 4-channel thermometer and data logger with the following features: - Supports K/J/T/E/R/S thermocouples and PT100 sensors - Four-channel display: simultaneously shows temperatures T1, T2, T3, T4 - Displays temperature difference T1-T2 - Wide temperature measurement range suitable for various applications - Allows simultaneous use of two thermocouples for measurement - Thermocouple temperature error adjustment function - PT100 temperature results can be displayed independently - Convenient temperature unit switching (°C/°F) - Backlight display for easy reading in dark environments - Supports data storage on SD memory card