Does air particle counter detect other gas except dust?

Air particle counter is use to detect fine particulate matters so use the laser sensor.
Other gas have to use other sensor and pumping device. As industry.
Also it can;t be setting at same machine so only detect fine particulate matters but give air qualtiy level.
Now following the technique update, we can add the formaldehyde detecting function into laser particle counter
As it can;t connect to computer, device allow people check 6 history record.

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