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JimShorts

Bangkok Air Pollution

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3 hours ago, manchega said:

just in case those that are in denial need a little shove,

 

 

We were having a technical discussion about the accuracy of our monitors. Nothing to do with being 'in denial'.

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Wednesday was a relatively good air quality day in BKK, and if the forecast holds, the rest of the week and into the weekend should be OK too....

 

I notice the wind speeds in the weather forecasts are generally showing more of a breeze than the past few weeks. Dunno if the improving conditions are mainly related to that, or any result of the government's efforts to supposedly crack down on polluting factories and such....

 

Tonight as of 10 pm. most BKK sensors are showing yellow / moderate AQ readings.

 

Forecast.png.8f3080430f7dfd8b637851a0a84d9841.png

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Amount of mask wearing parents picking kids up from kindergarten was down to 1 from a high of about 15 for last Wednesday, I didn’t do a proper survey as I don't have a work permit.

I did however feel the need to wear my mask whilst crossing the road bridge, first time in 6 months so I don't understand how they say the air was cleaner today.


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6 hours ago, TallGuyJohninBKK said:

Wednesday was a relatively good air quality day in BKK, and if the forecast holds, the rest of the week and into the weekend should be OK too....

 

I notice the wind speeds in the weather forecasts are generally showing more of a breeze than the past few weeks. Dunno if the improving conditions are mainly related to that, or any result of the government's efforts to supposedly crack down on polluting factories and such....

 

Tonight as of 10 pm. most BKK sensors are showing yellow / moderate AQ readings.

 

I am reading this same like you.  Nice breeze from So Ocean makes BKK air good.  Nighttime pollution levels are so low right now that it is difficult to be certain how much burning is happening.

I'm out of my pay-grade here, but my guess is little burning in BKK.  I looked North of BKK where inversion still exists and see no evidence of high nighttime PM, NO2, or SO2 - and wind shows near zero last night.

 

Capture.JPG

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18 hours ago, edwardandtubs said:

 

We were having a technical discussion about the accuracy of our monitors. Nothing to do with being 'in denial'.

FWIIW, a few comments.  I've been thinking about buying a Sndway unit because of size/portability, and humidity measurement. I haven't purchased yet because I'm hoping for valid readings reports like yours.  I saw good reports on Vson WP 6912 several months ago, and when a friend bought the unit, it was not worth the Farang money (no english, readings incorrect, etc.).

If we come to know more about accuracy and humidity adjustment in meters, great.  If not, no worries for me.

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9 hours ago, fishism said:


I did however feel the need to wear my mask whilst crossing the road bridge, first time in 6 months so I don't understand how they say the air was cleaner today.
 

 

According to the various monitoring points for BKK, the outside air today IS pretty good and not at unhealthy levels as it has been the past month.

 

Green is good. Yellow is OK... Orange and Red are varying levels of unhealthy. Today is mostly yellow thus far.

 

1415735947_2019-02-0711_13_39.jpg.d93e8f44f18ddbea6e1140b89bd5ba2b.jpg

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3 hours ago, DaveInSukhumvit said:

FWIIW, a few comments.  I've been thinking about buying a Sndway unit because of size/portability, and humidity measurement. I haven't purchased yet because I'm hoping for valid readings reports like yours.  I saw good reports on Vson WP 6912 several months ago, and when a friend bought the unit, it was not worth the Farang money (no english, readings incorrect, etc.).

If we come to know more about accuracy and humidity adjustment in meters, great.  If not, no worries for me.

 

The Sndway 825 is a good, accurate, portable PM2.5 sensor available at a reasonable price. I don't know of any better consumer choice in the value-performance-price spectrum for standalone sensors.

 

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4 minutes ago, TallGuyJohninBKK said:

 

The Sndway 825 is a good, accurate, portable PM2.5 sensor available at a reasonable price. I don't know of any better consumer choice in the value-performance-price spectrum for standalone sensors.

 

I think you probably mean the Sndway A25. Yes, that's the one I bought from Lazada and works very well for PM2.5 and humidity. However, its temperature gauge does not work at all, which is fine that's not what I bought it for. I think it's full model number is A25M, and being sold for about 1500 Baht.

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36 minutes ago, TallGuyJohninBKK said:

Green is good. Yellow is OK... Orange and Red are varying levels of unhealthy. Today is mostly yellow thus far.

And it is Chinese New Year so almost all business owned by them are closed until next week.  Makes a big difference in Bangkok population and factory activity (although much less than 30-40 years ago when Bangkok looked, and almost was, deserted).  

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1 hour ago, keemapoot said:

I think you probably mean the Sndway A25. Yes, that's the one I bought from Lazada and works very well for PM2.5 and humidity. However, its temperature gauge does not work at all, which is fine that's not what I bought it for. I think it's full model number is A25M, and being sold for about 1500 Baht.

 

Nope, the one I'm referring to is the Sndway SW-825... Got one on the desk here in front of me with the model number showing on the front. Bought directly from the Sndway store on AliExpress.

 

https://www.aliexpress.com/item/Air-Quality-Monitor-Mini-Laser-PM2-5-Monitor-Wall-mounted-Inovafitness-PM2-5-Detector-Gas-monitor/32826759103.html

 

1427960468_2019-02-0712_28_22.jpg.ac5f2c0ac24fa25e701babbd3f242df1.jpg

 

 

BTW, I did notice that the temperature readings on my units also are often off/wrong, though that's irrelevant to me. One reason might be the units have an internal rechargeable battery, and that seems to generate some heat/warmth when being charged, which usually leads to my units showing a higher temperature than the actual temperature in the room.

 

Edited by TallGuyJohninBKK

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19 minutes ago, TallGuyJohninBKK said:

 

Nope, the one I'm referring to is the Sndway SW-825... Got one on the desk here in front of me with the model number showing on the front. Bought directly from the Sndway store on AliExpress.

 

https://www.aliexpress.com/item/Air-Quality-Monitor-Mini-Laser-PM2-5-Monitor-Wall-mounted-Inovafitness-PM2-5-Detector-Gas-monitor/32826759103.html

 

1427960468_2019-02-0712_28_22.jpg.ac5f2c0ac24fa25e701babbd3f242df1.jpg

 

 

BTW, I did notice that the temperature readings on my units also are often off/wrong, though that's irrelevant to me. One reason might be the units have an internal rechargeable battery, and that seems to generate some heat/warmth when being charged, which usually leads to my units showing a higher temperature than the actual temperature in the room.

 

Yeah, that looks like the same unit as mine. Maybe buying directly from AliExpress they number the models differently. Yes, that thermometer was really off. Last weekend it was quite cold in my mountain home early in the morning, (actually it was 18 degrees C.), but the unit showed 29 degrees, so clearly not working.

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5 hours ago, TallGuyJohninBKK said:

 

The Sndway 825 is a good, accurate, portable PM2.5 sensor available at a reasonable price. I don't know of any better consumer choice in the value-performance-price spectrum for standalone sensors.

 

Thanks for the review.

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6 hours ago, keemapoot said:

I think you probably mean the Sndway A25. Yes, that's the one I bought from Lazada and works very well for PM2.5 and humidity. However, its temperature gauge does not work at all, which is fine that's not what I bought it for. I think it's full model number is A25M, and being sold for about 1500 Baht.

The A25M is made by UNI-T. Same kind of device, just different manufacture. The display is different and slightly smaller battery.

 

 

Uni-Trend-Tech-A25M_C118813.pdf

Edited by ExpatOilWorker

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1 hour ago, ExpatOilWorker said:

The A25M is made by UNI-T. Same kind of device, just different manufacture. The display is different and slightly smaller battery.

 

 

Uni-Trend-Tech-A25M_C118813.pdf

 

Thanks... I've never seen that particular unit before...

 

But I don't think I'd mistake it for the Sndway SW-825.

 

They look pretty different to me....

 

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5 minutes ago, TallGuyJohninBKK said:

 

Thanks... I've never seen that particular unit before...

 

But I don't think I'd mistake it for the Sndway SW-825.

 

They look pretty different to me....

 

Actually you are exactly right. I ordered and received the SW-825 from Lazada and am looking at it right now. However, when I first responded on this thread I simply opened up my past order page on Lazada, and when I clicked it, it automatically went to the new A25M. So, obviously, they are no longer selling the SW-825 on Lazada, as it has been replaced by the A25M. 

 

That explains the mix-up.

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