The #0735 Dilution Control Panel is designed to be used with the #0732D Dilution Probe for monitoring gaseous emissions with EPA reference method analyzers. The control panel features flow control of calibration gas and blow back air, adjustable dilution air pressure, digital gauges and 0 – 2 vdc analog output for dilution air pressure and orifice vacuum. With this system, continuous in-site sample extraction has low flow rates, longer filter life, eliminates the need for heated sample lines and transports the sample at positive pressure.