Measuring output PM2.5, PM10 Range 0.0-999.9 ug/m3 Power supply voltage 5V Maximum working current 100mA Sleep current 2 mA Operating temperature range -20-50℃ Response time 1s Serial data output frequency 1 time/s Particle diameter resolution Less than 0.3um Relative error 10% Product size 71x70x23mm.
Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($27.89): Terence
2. ($27.89): 2203ActiesNL
3. ($28.19): BG00c906
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG18PM, BG12module, BGNova, FBCOUPON1, BGRUMB15, BGAFF10OFF, 13f142, BGHONEY2110, BG2589f4, 00c906, ADMITAD2212, 2022ACTIESNL, Tabby20
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Nova PM SDS011 Air Quality Sensor [EU] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for Nova PM SDS011 Air Quality Sensor? There we go. The lowest price was: $17.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).