Profile: Phoenix Instruments, Inc. is a provider of continuous opacity monitoring systems, and continuous emissions monitoring systems. Our opacity monitor is a double pass ratio-metric opacity monitor, that compensates for LED intensity fluctuations, and can be stack-exit correlated. Our OPAC-100M opacity monitor is an LED light source system for non-compliant installations. Our Nema 12 control box contains all electronics, power supplies, and calibration adjustments for the LED, detectors & opacity electronics, & it can be mounted up to 200 feet from the light source. Our opacity monitor data acquisition systems and multiple system combiners are available for all compliant opacity installations.