Lascar el gfx tc k j and t type thermocouple data logger with graphic screen lascar el gfx tc cal t the lascar el gfx tc is a k j amp t type thermocouple data logger with graphic screen this standalone data logger can measure and store more than 250 000 temperature readings from a k j or t type thermocouple at a resolution of 01degc 02degf it comes supplied with a k type thermocouple capable of measuring from 80degc to 400degc 112degf to 752degfyour application