# Conclusions BME688 **URL:** \ **Category:** Sensors\ **Created:** [October 30, 2024, 10:10am UTC](https://community.purpleair.com/t/conclusions-bme688/10596 "2024-10-30T10:10:06Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![jheiler](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jheiler](https://community.purpleair.com/u/jheiler)\ **Post date:** [October 30, 2024, 10:10am UTC](https://community.purpleair.com/t/conclusions-bme688/10596/1 "2024-10-30T10:10:06Z")
Hello, I have been using my PA-II-FLEX version 7.04 for a year now, and I am wondering what conclusions can be drawn from the measurement results of the BME688. I have attached the daily average values, some of the peak loads were around 2000. - The values were variable, - always went back to zero, - were possibly dependent on the outside temperature. I would be pleased to receive any information. Kind regards ![experimental-voc-bosch-s](https://us1.discourse-cdn.com/flex020/uploads/purpleair/original/2X/6/6b38d1d66fcf880696e1cb96e5c23cbf46e0ed25.png) ---
**Author:** ![SRRanches](https://avatars.discourse-cdn.com/v4/letter/s/9de0a6/32.png) [@SRRanches](https://community.purpleair.com/u/SRRanches)\ **Post date:** [November 1, 2024, 2:34pm UTC](https://community.purpleair.com/t/conclusions-bme688/10596/2 "2024-11-01T14:34:11Z")
Good question. I am interested to hear the answer as I am thinking about replacing my old classic with one of the newer sensors. In the app, is there any comment made about relative potential effect on health related to different VOC levels detected (as exists for AQI)? ---
**Author:** ![dwhitemv](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/dwhitemv/32/1508_2.png) [@dwhitemv](https://community.purpleair.com/u/dwhitemv)\ **Post date:** [November 4, 2024, 6:16am UTC](https://community.purpleair.com/t/conclusions-bme688/10596/3 "2024-11-04T06:16:57Z")
Here is a link to a [SCAQMD report](https://www.aqmd.gov/aq-spec/sensordetail/purpleair-pa-ii-flex-voc) on the performance of the PurpleAir TVOC sensor. It might help to explain the results you’re seeing. I’ll let the report speak for itself… ---
**Author:** ![jheiler](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jheiler](https://community.purpleair.com/u/jheiler)\ **Post date:** [November 4, 2024, 7:59am UTC](https://community.purpleair.com/t/conclusions-bme688/10596/4 "2024-11-04T07:59:52Z")
Thank you for this information, but it is not possible for me to open any page under the address [www.aqmd.gov](http://www.aqmd.gov). ---
**Author:** ![emavrom](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/emavrom/32/6628_2.png) [@emavrom](https://community.purpleair.com/u/emavrom)\ **Post date:** [April 25, 2025, 5:24pm UTC](https://community.purpleair.com/t/conclusions-bme688/10596/5 "2025-04-25T17:24:36Z")
[https://www.aqmd.gov/aq-spec/evaluations/voc/summary](https://www.aqmd.gov/aq-spec/evaluations/voc/summary) ---
**Author:** ![dwhitemv](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/dwhitemv/32/1508_2.png) [@dwhitemv](https://community.purpleair.com/u/dwhitemv)\ **Post date:** [April 25, 2025, 6:38pm UTC](https://community.purpleair.com/t/conclusions-bme688/10596/6 "2025-04-25T18:38:39Z")
@emavrom - Thanks for the link update. I can’t edit my old post anymore, but this is where the evaluations have moved to. ---
**Author:** ![jheiler](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jheiler](https://community.purpleair.com/u/jheiler)\ **Post date:** [April 26, 2025, 10:06am UTC](https://community.purpleair.com/t/conclusions-bme688/10596/7 "2025-04-26T10:06:14Z")
Obviously, you need to be a user in the US to read that document. ---
**Author:** ![dwhitemv](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/dwhitemv/32/1508_2.png) [@dwhitemv](https://community.purpleair.com/u/dwhitemv)\ **Post date:** [April 26, 2025, 1:12pm UTC](https://community.purpleair.com/t/conclusions-bme688/10596/8 "2025-04-26T13:12:02Z")
Obviously? Is it geo-locked? I can’t tell.