The compound collecting on the cold finger is D9 THC isolate. The red LED indicates the heating mantle temp in Celsius. Pressure reads ¾ of one micron. Room pressure is normally 760,000 microns. The sensor for the heating mantle is under the glass and between the heating mantle. The oil temp is a bit lower. This gives an idea of the boiling point of THC under very deep vacuum. Low temperatures are key to high purity isolate.