Earth-Rite TELLUS monitors processing operations involving handling, transporting, or mixing of flammable or explosive products. Operating in real-time, it confirms that positive connection to ground exists and remains below 5 ohms, with green LED to provide indication. System is based on PSU/I.S. controller mounted in safe area as much as 350 ft from hazardous area. It is powered by 110 or 240 Vac and compliant with NFPA 77 and CENELEC 50404 guidelines.