ZH-03B particle sen...
 
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ZH-03B particle sensor sample anomalies - spikes in sample data  

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carboncycle
(@carboncycle)
Active Member
Joined: 2 months ago
Posts: 8
19/12/2019 11:37 pm  

I've run a few of these sensors in Mycodo and I've noticed spikes in the graphs.   These are indoor and I have a HEPA filter running constantly.   When I have run the sensor under conditions of moderate pollution ( the mountains nearby are on fire ) I haven't noticed this as much - however under light conditions I see this problem more often.


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Kyle Gabriel
(@kylegabriel)
Member Admin
Joined: 5 years ago
Posts: 100
08/01/2020 4:24 pm  

I'm going to see if I can add some software detection/removal of these anomalies, since they can cause all sorts of issues with conditionals/triggers that rely on the measurement data to perform actions.

Mycodo Developer


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carboncycle
(@carboncycle)
Active Member
Joined: 2 months ago
Posts: 8
08/01/2020 11:56 pm  

Thanks Kyle!  That was my concern as well - I had wondered why those folks that designed the PurpleAir gizmo used 2 of these.  At first I thought it may be a sensor failure consideration but it could be due to these random spikes.   The sensor is otherwise pretty good when there is something to sense.  The housing solution they came up with is a pretty good idea and easy to replicate.


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