309A SERIES PORTABLE ANALYZER FOR CARBON DIOXIDE & OXYGEN For checking carbon dioxide (CO2) and oxygen (O2) in controlled atmosphere (C/A) storage rooms, welding gas mixtures, and other process applications. FEATURES • Rugged design that is easy to operate and maintain • Fast warm-up and response • Solid state infrared detector for CO2 • Long-life electrochemical sensor for O2 • Digital readout meter with backlight • Rechargeable battery operation • Built-in sample pump, filter, and flowmeter • Weatherproof (WP) cabinet with clear Lexan cover OPTIONS • Recorder outputs of 0-1V or 4-20mA • Sample pre-cooler for hot samples • Stainless steel probe with sample hose • Condensate removal for wet applications • Suitcase (K) or bench top (BT) style cabinets available • AC power only operation • CO2 and O2 alarms with LED • Detachable/portable datalogger CALIBRATION • Air for CO2 zero and O2 span. • Analyzed calibration gas for CO2 span and O2 zero. NOVA ANALYTICAL SYSTEMS www.nova-gas.com Optional Precooler for hot or wet sample gases

DESCRIPTION The Model 309A Series Portable CO2 and O2 Analyzer is a rugged, fast-responding, and accurate instrument for conveniently monitoring the atmosphere in an apple storage C/A room. The standard range of the analyzer is 0-10% CO2 and 0-25% O2. Other ranges are available. The Model 309A series utilizes a single cell infrared detector for CO2 and a customer replaceable electrochemical sensor for O2. Neither sensor is affected by water vapor or other gas vapors in the sample gas. The O2 sensor typically lasts 3-4 years. In operation, a built-in sample pump draws in the gas sample through...