Dwyer CMS300 SKU: CMS300 $191.32 $229.95 Quantity -+ Add to Shopping Cart In Factory Stock Details Dwyer CMS300 : Carbon Monoxide Transmitter and Switch, 0 to 300 PPM CO, 4-20mA / 2-10VDC Output Data Sheet Installation Instructions DetailsData SheetInstallation Instructions Back Dwyer CMS300 : Carbon Monoxide Transmitter and Switch, 0 to 300 PPM CO, 4-20mA / 2-10VDC Output Back Back