The ppbRAE 3000 is the most advanced handheld volatile organic compound ( VOC ) monitor on the market. Its extended range of 1 ppb to 10,000 ppm makes it an ideal instrument for applications from HazMat/Homeland Security and industrial hygiene to indoor air quality and military applications. The RF modem allows real-time data communication with a base controller located up to 500 feet away, two miles with optional RAELink3 portable modem.