Made by Rosemount Model NGA2000, In good working conditon. Four Range: 2%, 5%, 10% and 20% (Plus any user's custom range). Non depersive infrared (NDIR) Ananlyzer. Read zero gas, 19.6%CO2 and 9.8% CO2 gases as shown in pictures. Any questions let me know at: elissatdfios at verizon dot net.The item "CO2 Analyzer 20% CO2 Carbon Dioxide Analyzer Calibrated and Good Working" is in sale since Monday, July 10, 2017. This item is in the category "Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Analytical Instruments". The seller is "evrsurplus" and is located in Long Beach, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Colombia, Panama, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion.