06/02/2021 07:40 Very large spike in NO2 (approx 750ppm) and corresponding trough in O3 and a long tail over nearly a week. This sensor is co-located at Coast Rd Precision Station, which does not show abnormal values over this period. Requested clarification if sensors are failing from supplier.

24/02/2020 Supplier confirms sensors are failing and need replacing.

Pod serial number: 1762150

Gas sensor type: NO2
Failed sensor serial number: 202090611
Serial number of new sensor: 202516103 dc 110

Sensor failure date: 06/02/2021 07:40

Notified : 24/02/2021
Sensor received : 09/02/2021
Replaced: 09/03/2021 13:35

Check Portal updated : OK

Please allow 2-3 days for sensor to re-base and stabilise.