City CiTiceL NX1 / NX-1 Nitric Oxide Sensor, Sensor Only
NX1 (also listed as NX-1) is a City CiTiceL nitric oxide (NO) sensing component. The existing product photo is marked NX1 AutoNO. This listing is for the sensor, not a complete portable gas detector.
Match the sensor version
NO means nitric oxide, not nitrogen dioxide (NO2). Check the complete label and equipment's specified sensor before ordering; matching the gas alone does not establish compatibility.
The linked manufacturer reference is a 2018 draft for NX1 part AF747-B05. That document is a model reference, not confirmation of the part suffix, production date or condition of current stock. Confirm the exact version, connector and required circuitry before selecting electrical or response-time specifications. Installation, calibration and testing must follow the equipment manufacturer's instructions.