AirSensa’s external monitoring installations use sensors that are relatively low-cost compared with statutory monitors. Such sensors (from any source) present a range of challenges to generating valid data, particularly over large networks of hundreds or thousands of devices, and particularly as such sensors are known to ‘drift’ over time in unpredictable ways. Generating accurate and validated data is an absolute requirement for any installation, so AirSensa’s unique calibration capability (patent applied for) is core to our offer.
Current best-practice for such equipment calls for devices to be calibrated every three months by co-locating them with publicly owned reference stations for several days and then comparing the data generated by the devices with the data from the reference station. This process is time-consuming, produces significant data gaps, and does not scale practically beyond a very small number of devices.