The rail-mounted smart temperature transmitter type LI-24 and LI-24Ex has an output of 4 to 20mA + HART, an in-out galvanic insulation and is ATEX certified. It features an automatic diagnostic system, a sensor which can be programmed to customer specifications, and a programmable measuring range. It has resistant thermoresistance line compensation and offers compensation of the thermocouple cold junction. Its ambient temperature range is from -25 to +80 degrees Celsius.