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A comment on Whistleblowers expose corruption in EPA Chemical Safety Office. Parent comment

Re:Whistleblowers expose corruption in EPA Chemical Safety O... by destitude on Saturday August 07, 2021 @12:29AM (#28095685)
The air sensor you use is PurpleAir, right? I found a sensor evaluation kit ZMOD4510-EVK-HC that has nitrogen dioxide and ozone sensors in it for around $112.
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