Mq131 datasheet

Hi everyone,

I plan to use MQ131 sensor from NCD. The product link is:²c-mini-module/.
In the website they said the detection range is 10ppb-2ppm. However in the datasheet they provided in here: said different thing, wherein the range is only 10-1000ppm.
Anyone here can help me to answer my confusion? because measurement range is very important for my case.
Thank you