Hunan Rika Electronic Tech Co.,Ltd is a privately held sensor manufacturer and solution provider of environmental & weather monitoring for 10 years. In addition to weather station, we offer a complete line of weather instruments including anemometers, barometers, thermometers, rain gauges, soil sensors, water sensors and accessories. Rika also develops bespoke products to meet specific customer requirements.https://www.rikasensor.com/air-quality-sensor.html