The WIN-SN-TNH-CO2-M (OD) is an industrial-grade, outdoor environmental sensor designed for high-accuracy, real-time monitoring of temperature, relative humidity, and $CO_2$ concentrations. It features a robust, low-maintenance enclosure and communicates via an RS485 interface using the industry-standard Modbus RTU protocol. The device offers highly flexible, user-configurable communication settings (Baud Rate, Slave ID, Parity, and Stop Bits) alongside a built-in factory reset function for seamless network recovery. Operating on 12-24V DC, it easily integrates with PLCs, SCADA systems, IoT gateways, and Building Management Systems across greenhouses, warehouses, and smart buildings.