Greisinger adjustable temperature transmitter gtmu mp x series greisinger gtmu mp 4 the greisinger gtmu mp 4 is a temperature thermometer with integrated transmitter from the gtmu mp series this thermometer has a sensor suitable for placing in ductsthe measurement is made by means of a resistive temperature sensor pt1000 2 wire the measuring range is freely scalable via buttons the transmitter outputs a linear current or voltage signalsthe gmtu mp 4 has a display by default and can