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CO240 EXTECH - Meter: CO2, temperature and humidity | Range: 0÷9999ppm (CO2) | TME - Electronic components
EXTECH, Backlit LCD, 0 to 9,999 ppm CO2 Concentration, Indoor Air Quality Carbon Dioxide Meter - 30ZV04|CO240 - Grainger
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Extech Arms HVAC & IAQ Pros with 6-Function Datalogging CO-CO2 Meter for Comprehensive IAQ Diagnostics - My Multimeter
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