423 SERIES CARBON DIOXIDE ANALYZER APPLICATION For continuous carbon dioxide (CO2) monitoring and control of greenhouses, mushroom farms, controlled atmospheres for produce storage, and others. FEATURES • Bright digital readout • Solid state infrared CO2 detector - no moving parts • Fast warm up - approx. 1 minute • Built in sampling pump • Unaffected by moisture or humidity • Dust-tight fiberglass enclosure • Can be used with Nova auto sequencer for multi-point sampling • Modular layout that is easy to maintain graphic to be added later OPTIONS • Hi/Low gas and low flow alarms available • Cold weather package for low temp use to -5°F (-20°C) • Relay contacts available for On/Off CO2 control • 4-20mA or 0-1VDC outputs CALIBRATION • Air (scrubbed of CO2) for zero • Analyzed CO2 cylinder for span NOVA ANALYTICAL SYSTEMS INC. www.nova-gas.com

DESCRIPTION The Nova 423 Series Carbon Dioxide monitor/controller has a sensitive solid-state infrared CO2 detector which continuously displays detected CO2 on a front panel digital meter. A built in sample pump draws in a sample through a filter and flow meter then on to the solid state infrared detector for analysis. A 4-20mA linear output signal is available for operation of a recorder or input to a computer. The Model 423 CO2 Monitor can be time shared between a number of sample points using a Nova automatic sequencer. Calibration need only be done once per year. Applications include HVAC...