At left is a "laboratory built" dual channel dissolved oxygen sensor amplifier. Most of the connections are of the "wire wrap" type for ease and speed of construction. This amplifier will take a 0 - 25 mv signal from a galvanic probe and boost the output to a 0 - 10 VDC signal, suitable for input to a controller or A/D converter for a computer (45, 68, 87, 136, 195, 199, 226).
Behind the technician is a Quadrupole Process Mass Spectrometer built by ABB Extrel that was installed and configured for exhaust gas analysis. It has the capability of monitoring exhaust gas (off gas) streams from 16 different bioreactors and analyzing the concentration of 16 different components simultaneously in each of these streams.
The process stainless steel transfer lines have associated with them a "self regulating heating system" that heats them to allow continuous flow of process gasses at 105 oC to the mass spectrometer. This keeps alcohols and other volatile organics of interest in the vapor state for analysis (26, 87, 136, 195, 199, 226).
ABB Extrel www.abb.com/extrel
503 11 th Ave. SE, Suite 5
Aberdeen, SD 57401
email@example.com Phone: 605 226-3595
Mobile: 605 377-4062
Fax: 605 226-3595