CO very high ppm sensor

i'm looking for a carbon monoxide sensor that can read up to 500000 ppm, does that sensor exist on the market?

ALG1924: i'm looking for a carbon monoxide sensor that can read up to 500000 ppm, does that sensor exist on the market?

Is your GOOGLE broken?

That is a lethal CO concerntration …

hammy: That is a lethal CO concerntration ....

Also explosive if the other gas has much O2 in it.

Paul