# Enviro+ PM sensor output **URL:** \ **Category:** Support\ **Created:** [September 24, 2019, 9:05pm UTC](https://forums.pimoroni.com/t/enviro-pm-sensor-output/11725 "2019-09-24T21:05:05Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![peteboz](https://avatars.discourse-cdn.com/v4/letter/p/dc4da7/32.png) [@peteboz](https://forums.pimoroni.com/u/peteboz)\ **Post date:** [September 24, 2019, 9:05pm UTC](https://forums.pimoroni.com/t/enviro-pm-sensor-output/11725/1 "2019-09-24T21:05:05Z")
Hi All. Just picked up an Enviro+ to connect to my pi zero and PMS5003 PM sensor. I have all the example programs working fine, but for some reason when running the particulates.py program: - The particles per 0.1L shows fine - But the PM concentration numbers all constantly 0: 2019-09-24 21:34:37.164 INFO PM1.0 ug/m3 (ultrafine particles): 0 PM2.5 ug/m3 (combustion particles, organic compounds, metals): 0 PM10 ug/m3 (dust, pollen, mould spores): 0 PM1.0 ug/m3 (atmos env): 0 PM2.5 ug/m3 (atmos env): 0 PM10 ug/m3 (atmos env): 0 > 0.3um in 0.1L air: 48 > 0.5um in 0.1L air: 16 > 1.0um in 0.1L air: 2 > 2.5um in 0.1L air: 0 > 5.0um in 0.1L air: 0 > 10um in 0.1L air: 0 I’ve used this sensor with Arduino projects and was able to get PM concentration levels so that makes it seem like it’s a software issue. Anyone have any ideas? Thank you in advance! ---
**Author:** ![nophead](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/nophead/32/5827_2.png) [@nophead](https://forums.pimoroni.com/u/nophead)\ **Post date:** [September 25, 2019, 9:11am UTC](https://forums.pimoroni.com/t/enviro-pm-sensor-output/11725/2 "2019-09-25T09:11:14Z")
This is what I am seeing at the moment indoors in my lab: ![image](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/4/44bb95694f9c8171182ed37a64bf70322e6c2b6f.png) It looks very similar to your readings but it will go to much higher readings of all sizes if I do a stir fry in the kitchen or change the bedding in the bedroom. It is just very low this morning. ![image](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/e/ef582fb7ff1edfaa70cb73c1b2a8f298710d280b.png) ---
**Author:** ![peteboz](https://avatars.discourse-cdn.com/v4/letter/p/dc4da7/32.png) [@peteboz](https://forums.pimoroni.com/u/peteboz)\ **Post date:** [September 25, 2019, 11:56am UTC](https://forums.pimoroni.com/t/enviro-pm-sensor-output/11725/3 "2019-09-25T11:56:57Z")
Thanks for the reply! Do you have any non-zero values for the PM measurements? PM1.0 ug/m3 (ultrafine particles): 0 PM2.5 ug/m3 (combustion particles, organic compounds, metals): 0 PM10 ug/m3 (dust, pollen, mould spores): 0 PM1.0 ug/m3 (atmos env): 0 PM2.5 ug/m3 (atmos env): 0 PM10 ug/m3 (atmos env): 0 Thanks ---
**Author:** ![nophead](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/nophead/32/5827_2.png) [@nophead](https://forums.pimoroni.com/u/nophead)\ **Post date:** [September 25, 2019, 3:26pm UTC](https://forums.pimoroni.com/t/enviro-pm-sensor-output/11725/4 "2019-09-25T15:26:35Z")
I don’t display those so I don’t know but I think they had very small values when I originally tested it so I use the counts per 0.1l as they looked more interesting. I think it is hard to get to a micro gram with such small particles. Isn’t 0.3um smaller than the wavelength of light? ---
**Author:** ![peteboz](https://avatars.discourse-cdn.com/v4/letter/p/dc4da7/32.png) [@peteboz](https://forums.pimoroni.com/u/peteboz)\ **Post date:** [September 25, 2019, 11:43pm UTC](https://forums.pimoroni.com/t/enviro-pm-sensor-output/11725/5 "2019-09-25T23:43:00Z")
Thanks. I moved the unit to a different location and I’m now seeing some results for those parameters, albeit very low (1,2) as you saw as well. Thanks again!