A special instrumentation microcomputer designed for neutron-gamma moisture and density gauge is described. Based on a Z80 CPU with 4k bytes ROM and 2k bytes RAM it provides functions of display

keyboard

print and communication in the simplest way. Used as a neutron-gamma moisture and density gauge it has five work modes: parameter input

check

calibration

scaler and moisture-density measurement. The period of measurement can be chosen from one second to hours. The system is applicable in other cases and

in fact

has been used as fluorescence analyzer and Mössbauer spectroscopy successfully.