With the mounting pressure to clean up the atmosphere, many local authorities are now legislating the maximum density of smoke released into the atmosphere from chimneys. They now require chimney output opacity (smoke density) and temperature to be monitored, averaged and recorded at one minute intervals with a date and time stamp.
Texmate installed a Tiger 320 Series DI-502T controller displaying the averaged opacity and minimum temperature readings. The controller can be programmed to either data log these readings every minute, or download them directly to a serial printer. After each download, the controller resets the readings for the next calculation and download.