This RS485 Formaldehyde Temperature and Humidity Transmitter is equipped with a high-precision electrochemical sensor, supporting the monitoring of formaldehyde concentration (0-5ppm), temperature (-40℃~+80℃), and humidity (0~100% RH). With a resolution of 0.01ppm, it boasts high measurement accuracy and rapid response. Adopting the ModBus-RTU protocol, the device offers a maximum communication distance of 2000 meters and features a wide DC voltage supply range (10-30V) for multi-scenario adaptation. Its waterproof wall-mounted design enables easy installation, and an optional OLED display is available. Supporting 24/7 continuous online monitoring, it is widely applicable in industrial environments, air purification equipment, and other scenarios.

The RS485 Nitrogen Dioxide Transmitter is a high-precision gas monitoring device specially designed for industrial scenarios. It supports a wide voltage supply of 10-30VDC, with a power consumption of only 0.18W, and can operate stably in a wide temperature range of -40~80℃. This transmitter features a measurement range of 0-20ppm (customizable), a resolution of 0.1ppm, and a detection accuracy of ±5% FS. Equipped with RS485 standard output, it boasts fast response speed (≤30S at 20ppm) and excellent stability. Ideal for factory exhaust emission monitoring, air quality monitoring and other scenarios, it is a reliable choice for nitrogen dioxide concentration monitoring in industrial environments.