Hydrion Ammonia Test Papers 0-100 ppm, Single 15 ft. Roll

These test strips did not register any ammonia in the air, although there was and when using a professional ammonia meter to verify it. I had more than 1 PPM present and maybe these strips only register at a much greater rate.

I’m trying to attach a photo, but Amazon wants me to give away all access to my phone, so I’m not going to do that. My strips are orange, the photo you have in your advertisement, the strip is white, and then you dip it in and it turns orange, so now I’m confused, are my strips supposed to be white or orange? Also, where do we find out what levels are safe and what levels are dangerous ?