BadGrandpa007's latest activity

in our country every school has these co2 meters and they try to keep ppm's under 800, brain is not working full capacity over these...

Nonsense. It may differ from person to person but out of experience I can tell you that 1500 ppm is no problem at all. I had...

yes overnight in that room im sleeping it gets even to 2K +.. you cant imagine how small the rooms are :D when i have visitors it gets...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5380556/#:~:text=Concentrations%20of%20more%20than%2010,loss%20of%20consciousness%20in%20sec...

the device cost 300usd - its a reliable device, one of the best on the market (Aranet4), i trust it! And yes, you cant imagine how bad...

it is, i have a pretty expensive co2 measurer, i asked a friend to give it to me, tested it in my house, the ventilation is bad there..

Exactly we do not require accuracy as much as we require stability, ie that our device measures consistently and that it is consistent...

Thanks a lot! i had this (Uni -T UT383 or the Bluetooth version) device in mind after stumbling up on this y-video.. but then in his...

Attached is a document I wrote to help with the conversion. To convert your Mars SP 250, I'd go with the conversion factor of 0.015. I...

I traded email with the programmer (I've been a software engineer for > 30 years) and that topic came up. He said that Android had an...

yeah i tried it on Android phone, it is not useful at all.. but for iphones it really kinda works, i watched many y-tube videos. lucky...

yes , there is a plenty of co2 because the room is small, all rooms actually are small and im living in there. When i ventilate the...

it has a map, but it doesnt tell any story, the map , the radings are from one height and if i want to adjust or dim the LED, the...

yeah i got it, its also kinda hard tevery time o grow different plants, they all need something different..i should choose one...

Hi, i had the idea to buy a cheap LUX meter to calculate the aproximate DLI and PAR. I see people are doing that. Some guys alrady...