Sulfur trioxide measuring device and method

The invention discloses a sulfur trioxide measuring device and method.The sulfur trioxide measuring device comprises a box suitable for introducing an ice-water mixture, two sampling devices, a supporting plate and an adjusting assembly, two mounting holes are formed in the top wall of the box, and the two sampling devices are inserted into the box through the two mounting holes respectively; the two sampling devices are communicated with each other, one of the two sampling devices is suitable for collecting sulfur trioxide gas for the first time, the other sampling device is suitable for collecting sulfur trioxide gas for the second time, the supporting plate is arranged in the box body and connected with the two sampling devices, and the adjusting assembly is connected with the box body and the supporting plate so as to adjust the position height of the supporting plate relative to the box body. The sulfur trioxide measuring device provided by the invention has the advantage of strong adaptability to sampli