Table 2 Individual sensors uptime per location and comparison with the reference background station. For AQM B.1 the Alphasense OPC-N2 reported a random signal. The Honeywell HPMA115S0 was only operational for AQM A.1. The table also presents some characteristics of the different sites.

From: Long-term field comparison of multiple low-cost particulate matter sensors in an outdoor urban environment

  Honeywell HPMA115S0 Plantower PMS5003 Plantower PMS7003 Alphasense OPCN2 Height above ground (m) Location
AQM A 1 91% 94.5% 94.7% 92.6% 3.8 School entrance, East facing
2 96.6% 96.6% 95.9% 2.4 School employees car park (6 parking spaces), East facing
3 99.5% 52.1% 98.9% 3.5 School playground, East facing
AQM B 1 57.4% 99.7% 0% 2.1 School entrance, South facing
2 98.9% 98.9% 56.6% 3.4 School playground, North facing
3 95.7% 96.5% 95.7% 3.4 Opposite from the playground, South facing
Reference station    92.8% 4