Quick view Compare Add to Cart The item has been added Senva Senva TGW-BNX-AS : Wall Mount Toxic Gas NO2 Sensor/Controller, BACnet MS/TP, Modbus RTU, Modbus ASCII Output, LCD Display, Solid/Opaque Enclosure, 7-Year Warranty MSRP: Was: Now: (Inc. Sales Tax) MSRP: $1,001.70 Was: Now: $400.50