Profile: Maxitrol Co. produces gas combination controls, gas safety products, and the new Plug1 gas convenience outlet. We develop technology for the natural gas industry. Our products include gas filters, ball valves, modulating valves, redundant combination controls, and springs. Our mixing tubes are used with duct sensor applications and inlet air sensors. Our series 20/30 electronic gas flame modulation systems are designed for commercial and light industrial space heating as components of indirect fired units with atmospheric burners. The series 20 is designed for single furnace operation, and the series 30 is capable of handling up to four furnaces. Our track mounted signal conditioners and M/MR valves can be configured for direct or indirect fired gas applications.