This CE-certified industrial-grade ETO gas transmitter adopts an electrochemical principle, featuring an ultra-high resolution of 0.1 ppm and a measurement range of 0-100 ppm with a 1-second data refresh rate. The device supports RS485 output and the ModBus RTU communication protocol, with a default baud rate of 9600 bit/s and a maximum communication distance of 2000 meters. It is powered by a wide DC voltage range of 5-28V and encased in a waterproof wall-mounted housing with high protection performance, suitable for harsh industrial environments with a temperature range of -20℃ to 50℃ and a humidity range of 15%-90% RH (non-condensing). Equipped with a built-in temperature and humidity sensor, it boasts excellent anti-interference capability and is applicable to scenarios such as industrial safety and environmental monitoring, providing accurate and stable data support for gas detection.