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[#51] 空氣清新機請教    
Reading is very low for pm2.5 indoor.


shektau6
個人訊息 會員
138.xxx.xxx.226
2020-07-29 09:53
[#50] 空氣清新機請教    
當然, 我啲死窮L 唔會去買啲幾千既 探測儀.
偉大的淘寶, 唔知真定假貨都百幾起跳... (講緊粒chip...).. 像真啲既都兩舊幾.

要買平野又唔係冇計...
話說大陸好多過期產品, 高大上, 過左氣就冇人理.
去閑魚你會搵到一款叫墨X空氣果...
佢既1代同1s 都係用呢粒 chips. 而且外型仲算好得..
你怕大陸監控既唔駁上網local用完全冇問題, 係個操作有啲低能...
好似我咁, 唔多怕死既寫個Script, 每15分鐘同步一次駁入智能家居... 部iphone 間唔中就會話我知二氧化碳異常.

再唔係買返來拆chip都抵, 包正貨先. 貨尾係全新, 約兩舊水人仔....
唔好買二代, 冇CO2的...

反正佢個Pm2.5 sensor我未見過讀數唔係0。 令外個溫度唔準, 因為件野本身會發熱。。。

mcdull
個人訊息 正式會員
219.xxx.xxx.87
2020-07-28 22:50
[#49] 空氣清新機請教    
#46 所以我話好X貴.. 我只會考慮 SenseAir.

Item SenseAir® S8
Target gas CO2
Operating Principle Non-dispersive infrared (NDIR)
Measurement range 0.04 to 2% volume CO2 (Note 1)
0 to 3.2% volume CO2 extended range (Note 2)
Accuracy ±0.02% volume CO2 ±3% of reading (Notes 3 and 4)
Response time 2 minutes by 90%
Operating temperature 0 to 50° C
Operating humidity 0 to 85% RH non condensed (note5)
Storage temperature -40 to +70 C
Dimensions 32.7 x 19.7 x 9.9 mm
Weight < 8 grams
Power supply 4.5 V to 5.25 V unprotected against surges and reverse connection
Power consumption 300 mA peak, 30 mA average
Life expectancy 15+ years in normal commercial environments
mcdull
個人訊息 正式會員
219.xxx.xxx.87
2020-07-28 22:42
[#48] 空氣清新機請教    
#47 that looks very cool! Please compare and share if they hv more or less readings among your gadget. If it’s good I’ll get it for my bedroom.
zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-28 20:30
[#47] 空氣清新機請教    
Just picked up a temtop m10 meter but need to place outdoor for 6 hrs for calibrating the HCHO calibration...

https://www.amazon.com/Temtop-M10-Professional-Electrochemical-Rechargeable/dp/B07DHXQXGK?ref_=ast_sto_dp


最後修改時間: 2020-07-28 20:10:24
shektau6
個人訊息 會員
119.xxx.xxx.3
2020-07-28 20:06
[#46] 空氣清新機請教    
Co2儀,如果多塵,好似話用一段時間就會玩完
dennis815
個人訊息 會員
45.xxx.xxx.29
2020-07-28 19:24
[#45] 空氣清新機請教    
#43
Yes, my Co2 isn't really good becos of air conditioner. It's really difficult to make a green reading of Co2. Perhaps open the windows every 2 hrs?

Regarding pm2.5, it really depends where you live ... very busy districts is so different from quiet districts. Perhaps you live in very good area la ... If Pm2.5 isn't useful all Hepa filters and air purifier is useless ga la ...

I also checked IQair airvisualizer's Pm2.5 censor. It has a three years life according to spec. So that toy could be disposable three years after. 500 hkd a year. Ok la. At least I could compare and toy with different censors and learn more.

zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-28 19:18
[#44] 空氣清新機請教    
I got this Co2 sensor from Amazon

https://www.amazon.com/Hydrofarm-Autopilot-Desktop-Monitor-Logger/dp/B01FYWU2IS?ref_=ast_sto_dp

I am able to keep reading under 1500 most of the time. ( With windows slightly open and using exhaust fan)

You can't balance clean air and co2 level unless you have a proper air exchanger



最後修改時間: 2020-07-28 19:19:55
shektau6
個人訊息 會員
14.xxx.xxx.156
2020-07-28 19:18
[#43] 空氣清新機請教    
香港地... 屋細, 但環境污染唔嚴重.
Pm2.5 甲醛 detector 其實冇乜用.
反而係 CO2, 先最緊要. 尤其長開冷氣..

但一般 sensor 都冇 CO2, 因為好X貴.
mcdull
個人訊息 正式會員
219.xxx.xxx.87
2020-07-28 19:10
[#42] 空氣清新機請教    
Thank you. I’m testing too. Hope it isn’t faulty ... but the outdoor reading is provided by environment protection department if Hong Kong ...
zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-28 18:55
[#41] 空氣清新機請教    
http://aqicn.org/city/hongkong/m/

Hard to believe the current outdoor pm2.5 outdoor reading is 10.

My taobao meter is broken and I am getting a replacement today, will compare our reading tonight.




shektau6
個人訊息 會員
138.xxx.xxx.226
2020-07-28 18:51
[#40] 空氣清新機請教    
Arrived

zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-28 18:41
[#39] 空氣清新機請教    
Arrived

zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-28 18:41
[#38] 空氣清新機請教    
#36

Haha I worry too. Wish me luck.
zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-21 18:51
[#37] 空氣清新機請教    
The previous one for the smaller model, and here's for the big ones:

https://smartairfilters.com/learn/smart-air-knowledge-base/are-the-blast-and-blast-mini-safety-certified/

zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-21 18:50
[#36] 空氣清新機請教    
Thanks & Good luck !

I have no objection to Made in China products. My phones & my computers are made in China. I do have concerns on China brands.

最後修改時間: 2020-07-21 18:49:54
Kenny
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42.xxx.xxx.155
2020-07-21 18:47
[#35] 空氣清新機請教    
Kenny

I guess it's this one:

https://smartairfilters.com/wordpress/wp-content/uploads/2020/02/CE-GZES1907020436HS-REDACTED.jpg

zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-21 18:46
[#34] 空氣清新機請教    
I can share the data later tonight. I have an IQAir and a Sharp unit (the one claims to have 10 years HEPA life span).

I don't keep my windows fully closed to balance the CO2 concern and pm2.5 level....

shektau6
個人訊息 會員
138.xxx.xxx.226
2020-07-21 18:46
[#33] 空氣清新機請教    
#31 Kenny so it's a mis calculation ...
zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-21 18:42
[#32] 空氣清新機請教    
I found their safety standard here:

https://smartairfilters.com/learn/smart-air-knowledge-base/does-the-sqair-have-a-safety-certification/

Sqair has domestic CQC safety certification and European standard CE certification. In addition to safety certification, Sqair has passed the performance-based national standard GB / T18801-2015.

You can view the certificates online using the links below:

Sqair CE Certificate: http://smartairfilters.com/wordpress/wp-content/uploads/2020/02/CE-GZES1907020436HS-REDACTED.jpg
Sqair Performance Certificate: http://smartairfilters.com/wordpress/wp-content/uploads/2020/02/Sqair-HEPA-Performance-Certificate-KJ20191225-EN.pdf

I see, you want SGS safety certificate ...

最後修改時間: 2020-07-21 18:44:55
zbigniew821
個人訊息 會員
123.xxx.xxx.219
2020-07-21 18:39
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