The heads can hold amplifying electronics called transmitter or microconvertidor.
Temperature ranges are configurable by potenciómetros y jumpers de soldadura in the case of analog converters in smart devices.
There are different types of output signal( 4-20 mA, HART, data bus, etc.) and several options of isolation of in/output or classification (Exia, Exd, etc.).
The most frequent devices are:
Converter MCU-2. Basic devices configurable by jumpers. Suitable for RTDs PT100.
Converter TRB. Programmable transmitter with output 4-20 mA and thermocouple or RTD input.
Converter T03BU/WE. Programmable transmitter with output 0 a 10 Vdc and thermocouple or RTD input.
Transistors FLEXTOP. Several models with communication HART, ATEX Eixa or PROFIBUS.