Based in Monroeville, Pa., Rel-Tek Corporation specializes in the manufacture of gas monitoring and control systems. The company offers a wide array of products and services such as computer based data logging and telemetry software, field input/output hardware, ES Tracker, automatic sensor calibration, stand-alone systems, automatic gas sensor calibration and many more. Rel-Tek Corporation caters to the needs of underground mines, tunnels, factories, water treatment, office buildings, municipal bus garages and other hazardous sites. The company is also a supplier to alternative-fueled vehicle maintenance operations that include Compressed Natural Gas (CNG), Liquefied Natural Gas (LNG) and Liquefied petroleum gas (LPG).