The PYRO MicroTherm optical pyrometer temperature sensor for non contact high temperature measurement is a disappearing filament pyrometer for precision high temperature measurements on small targets to 0.0005". One of the many benefits associated with the PYRO MicroTherm is that the target need not fill the entire field of view. This is especially effective when measuring targets such as wire. The PYRO MicroTherm's telescope uses a proven high quality huygen microscope type ocular which provides 20x magnification of the target area. The in view instrument filament allows precision intensity matching capability to 2-3°C repeatability. The PYRO MicroTherm's digital display electronic unit allow users to insert an emissivity value to display an emissivity-corrected temperature. For on-line data transmission applications, the PYRO MicroTherm optical pyrometer provides both analog and digital outputs.