The TRIPLETT Model TMDL400 4-Channel Type K Thermocouple Datalogger is a precision instrument for comprehensive temperature monitoring. Equipped with a backlit LCD, this datalogger simultaneously displays temperature readings across 4 channels, along with date, time and T1 to T2. Its versatile functionality enables measurements of surface temperatures of solids, liquids and ambient air temperature. The TMDL400 can datalog multiple files, each containing up to 30,000 readings, with a customizable sampling rate between 1-second to-90-minutes. Features include a programmable start time, user-configurable audible and visual high/low alarms per channel and an adjustable offset for probe compensation. Also included are Minimum/Maximum recording capabilities, a Data Hold function and an auto power-off feature with disable function to conserve battery life. This wall-mountable device Includes 4 AA batteries, 4 Type K Thermocouple bead probes, SD Card and Universal AC Adapter (100-Volt to 240-Volt) with 3 plugs (US, UK, EU). 1-year warranty.