The HAL-HFX105 utilizes non-dispersive infrared (NDIR) sensing technology to deliver high-accuracy carbon dioxide measurements. It features temperature and humidity compensation, 4–20 mA / 0–10 V analog outputs, RS485 Modbus RTU communication, and optional Wi-Fi/LoRaWAN modules. Applications include demand-controlled ventilation (DCV), greenhouse climate management, laboratory safety monitoring, and smart building BMS integration. Its compact enclosure meets IP54 rating for reliable performance in diverse indoor environments.