The unit is controlled by using two decade thumbwheel switches adjustable from 00 to 99, and a three position ozone level switch for low, medium and high settings. The NOxGen 3 R provides the option of remote control using TTL levels for all operational functions. The Signal Group’s NOxGen 3 comes in a 19” rack type, 3 units high enclosure. It can be bench top used or fitted into a 19” rack console. For bench top use there are extendible feet at the front which can be used to tilt the angle of the instrument back for ease.

FID: the VOC emissions monitoring reference method – for over 50 years!
The Flame Ionisation Detection (FID) method was first developed in the 1950s for the laboratory analysis of organic chemicals. Later, when environmental regulations began to limit the emissions of volatile organic chemicals (VOCs) in the 1970’s and 1980’s, the FID method was adapted for emissions monitoring. Signal Group was one