Do you have any calibration procedure?

[Karen Forero]

I have two safecast air working with OPC sensors by Alphasense and I get two significantly different measurements. I wonder if you already found the same issue and if you created some kind of calibration procedure. I appreciate if you can help me with some information about it.

[Sean Bonner, Safecast]

The Alphasense OPC is “factory calibrated” but one of the issues we’ve seen with it is that dust and bugs can get n them impacting readings, they are very sensitive to humidity but also to power, so if you have different quality power going to each them that can significantly impact the measurements coming off them. I’d say swap the power on them first and see if the readings change on each as thats the easiest issue to change, you can also blow them out with canned air to try and clear out any gunk...

-s

Sean Bonner

Co-Founder, Director of Global Operations

Safecast.org | pgp key

On March 2, 2018 at 3:08:40 AM, Karen Forero (kare...@gmail.com) wrote:

I have two safecast air working with OPC sensors by Alphasense and I get two significantly different measurements. I wonder if you already found the same issue and if you created some kind of calibration procedure. I appreciate if you can help me with some information about it.

--
You received this message because you are subscribed to the Google Groups "Safecast Air Quality Discussion" group.
To unsubscribe from this group and stop receiving emails from it, send an email to safecast-air...@googlegroups.com.
To post to this group, send email to safeca...@googlegroups.com.
Visit this group at https://groups.google.com/group/safecast-air.
For more options, visit https://groups.google.com/d/optout.