Flow system

Specifications

• Carrier gas : synthetic air (5.0 purity) with controllable relative humidity (RH: 0–90%) and flow (10–200 ml/min);
• Test gases: CO, CH₄, NO₂, H₂S, NH₃, SO₂

Description

Flow system is used to dose different target gas concentrations under dynamic regime. It consists of eleven individual channels (dry synthetic air, humid synthetic air, NO₂, CO, CH₄, NH₃, H₂S, SO₂). Every channel is equipped with one mass flow controller (MFC) and two solenoid valves which are computer controlled via D/A cards. Desired gas concentrations (from ppb to ppm level) are obtained by appropriate adjustment of carrier/target gases. In order to avoid any possible channel contamination, corrosion, or outgassing, high quality materials (Swagelock stainless steel tubing and fittings, Kalrez, Teflon, glass tubing) are used.