# VOC Measurement Availability **URL:** \ **Category:** Sensors\ **Created:** [September 30, 2024, 4:23pm UTC](https://community.purpleair.com/t/voc-measurement-availability/10390 "2024-09-30T16:23:37Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Facts\_Really\_Matter](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/facts_really_matter/32/3846_2.png) [@Facts\_Really\_Matter](https://community.purpleair.com/u/Facts_Really_Matter)\ **Post date:** [September 30, 2024, 4:23pm UTC](https://community.purpleair.com/t/voc-measurement-availability/10390/1 "2024-09-30T16:23:37Z")
I would like to review VOC data from sensors. I see that only a few sensors are reporting VOC levels. 1). How can I upgrade my sensor to report VOC levels ? 2). Do new sensors automatically report VOC ? ---
**Author:** ![Josh\_PurpleAir](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/josh_purpleair/32/2842_2.png) [@Josh\_PurpleAir](https://community.purpleair.com/u/Josh_PurpleAir)\ **Post date:** [October 2, 2024, 7:22pm UTC](https://community.purpleair.com/t/voc-measurement-availability/10390/2 "2024-10-02T19:22:27Z")
PurpleAir sensors use the BME280/688 for temperature, humidity, pressure, and VOC measurements. - The BME280 provides temperature, humidity, and pressure readings. - The BME688 provides these as well, and additionally provides VOC readings. Please note that the VOC readings are experimental. South Coast AQMD has [a report available here](https://www.aqmd.gov/docs/default-source/aq-spec/laboratory---air-toxics/purpleair-pa-ii-flex-voc---laboratory-evaluation.pdf?sfvrsn=55e18761_7) where they examined VOC readings from PurpleAir sensors. 1. If your sensor is a PurpleAir Classic or Classic-SD, you can purchase a BME688 from us and replace the BME280 it currently uses. This will allow it to provide VOC readings. 2. Newly purchased PurpleAir [Flex](https://www2.purpleair.com/products/purpleair-flex), [Zen](https://www2.purpleair.com/products/purpleair-zen), and [Touch Indoor](https://www2.purpleair.com/products/purpleair-touch) devices come with a BME688 and provide VOC readings. Newly purchased PurpleAir [Classic](https://www2.purpleair.com/products/purpleair-pa-ii) and [Classic-SD](https://www2.purpleair.com/products/purpleair-pa-ii?variant=40067691774049) devices come with a BME280 and are not capable of VOC readings without the above-mentioned upgrade. ---
**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, 2:29pm UTC](https://community.purpleair.com/t/voc-measurement-availability/10390/3 "2024-11-01T14:29:43Z")
If I am not mistaken, the PA sensors that report “VOCs”, actually report TVOC ---
**Author:** ![Jack](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/jack/32/5922_2.png) [@Jack](https://community.purpleair.com/u/Jack)\ **Post date:** [December 7, 2024, 1:48am UTC](https://community.purpleair.com/t/voc-measurement-availability/10390/4 "2024-12-07T01:48:40Z")
I just bought a flex and registered it. How can I see the humidity and VOC levels on my local sensor website? (ie: 192.168.3.123 is where it’s at on my network and I only see the PM numbers). I got the flex specifically because I wanted to see the VOC and humidity because I smell JET-A fuel at times during the inversions in SLC. I live near the airport. I don’t see them anywhere on my local sensor webpage. I only see the standard PM1.0 (µg/m3) PM2.5 (µg/m3) PM10 (µg/m3). I know I can see it with menu options on the purpleair map, but I’d like to see them all at once for my local sensor. Thank you in advance. ---
**Author:** ![TerraAyAy](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/terraayay/32/4640_2.png) [@TerraAyAy](https://community.purpleair.com/u/TerraAyAy)\ **Post date:** [May 30, 2025, 2:52pm UTC](https://community.purpleair.com/t/voc-measurement-availability/10390/5 "2025-05-30T14:52:25Z")
Good day, Do you have (can you get) a copy of the South Coast AQMD report? The link is no longer valid ---
**Author:** ![Kieran](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/kieran/32/6220_2.png) [@Kieran](https://community.purpleair.com/u/Kieran)\ **Post date:** [June 2, 2025, 7:29pm UTC](https://community.purpleair.com/t/voc-measurement-availability/10390/6 "2025-06-02T19:29:09Z")
Hello, The full evaluation report can be found here: [https://www.aqmd.gov/docs/default-source/aq-spec/laboratory---air-toxics/purpleair-pa-ii-flex-voc---laboratory-evaluation.pdf?sfvrsn=55e18761\_7](https://www.aqmd.gov/docs/default-source/aq-spec/laboratory---air-toxics/purpleair-pa-ii-flex-voc---laboratory-evaluation.pdf?sfvrsn=55e18761_7)