IST-QUADTEK® M554 Spyrometer3 The IST-Quadtek® Spyrometer3, with its patented combination of a color video camera and a scanning pyrometer, gives the operator the ability to see process conditions while measuring the temperature of virtually any area in the field of view. The M554 imaging pyrometer takes the video image and the temperature information, multiplexes it and sends it, via coaxial cable, to the image processor in the control room and displays it on a VGA monitor. Onscreen temperature measurement data is also accessible through 4-20mA outputs which can easily be interfaced to your control system.