Rel-Tek manufactures a complete line of gas monitoring and control systems, including PC-based data logging and telemetry software and a full complement of field I/O hardware. Sensors include carbon monoxide and other toxics, methane and all combustibles, oxygen(% and PPM), carbon dioxide, NO2, SO2, H2S, smoke, temp, pressure, RH and air velocity. We supply complete systems -- not just bits and pieces -- ideal for both large and small monitoring and control situations. Our world-class Millennia-DX PC-based SCADA software provides a dependable, easy to use HMI utility that is powerful, yet economical. Our clients include underground mines, tunnels, factories, water treatment, office buildings, municipal bus garages and other hazardous sites. Rel-Tek is a major supplier to alternative-fueled vehicle maintenance operations (CNG, LNG and LPG). Over 100 approval actions cover this equipment for use in classified areas.