Siemens QPM2100 SKU: QPM2100 $428.12 $1,126.63 Quantity -+ Limited Factory Stock Details Duct CO2 Sensor, 0-2000 ppm, 0-5V/0-10V/4-20mA Output, 5-Year Warranty Data Sheet Installation Instructions DetailsData SheetInstallation Instructions Back Duct CO2 Sensor, 0-2000 ppm, 0-5V/0-10V/4-20mA Output, 5-Year Warranty Back Back Stocked items ship in 1 business day. Factory items typically ship in 3-5 business days (estimate only). Actual times may vary.Email sales@energycontrol.com for more information.