Data from the 10 stations belongs to Hanoi DoEP are displayed on moitruongthudo.vn. The website updates data from the last day or a few hours ago.
The station is a mobile version with sensor-grade monitoring supplied by Envrionmental SA called CAIRPOL. A brochure of this system linked here and a newer version of brochure. It is not clear what is the method or device for PMs (product code is A40-0215 since the CAIRPOL sensor stated its specialty on miniature sensors for gases (such as ozone, nitrogen dioxide, sulfur compounds).
Monitor is manufactured by Met-One. The model is not listed on the website. Met-One is a household name for reliable equipment. BAM-1020 is a popular model by Met-One.
CEM: 556 Nguyen Van Cu (Gia Lam)
Two brands for dust equipment (PM2.5, PM10) were mentioned are from HORIBA and GRIMM. For examples, HORIBA APDA-372 using BAM, and GRIMM EDM180 using 660-nm laser scattering diode.
Only one out of seven stations provide real-time data (recently) with public access 556 Nguyen Van Cu. This station targets emissions from traffic nearby.
Monitoring data from 556 Nguyen Van Cu station is updated hourly (checked on Apiril 14, 2019) at enviinfo.cem.gov.vn. However, the data update is spotty. The past data can be retried via speadsheet (Excel) upto to the last 7 days.