Description HCN-D4 - Hydrogen Cyanide D (HCN) Sensor - D-Series Datasheet: https://ametekcdn.azureedge.net/mediafiles/project/oneweb/oneweb/alphasense/products/datasheets/alphasense_hcn-d4_datasheet_en_1.pdf?revision:c1700dcc-309b-4091-a5d3-711392602a99