King's College London have launched an automatic notification service that will warn site operators when their TEOM or FDMS filter needs changing.

Our MONNET data collection system automatically monitors the loading of each TEOM and FDMS filter in the networks that we manage. MONNET also predicts the date when filter loading will reach 90% and the filter needs to be changed. Once the filter loading reaches 80% (85% for FDMS and PM2.5 TEOMs) , MONNET will email the site operator, telling them the expected date that the filter will reach 90%.

This will typically provide 3 to 5 days warning for roadside sites and slightly longer for sites in background locations. If the filter hasn’t been changed after 3 days, a reminder email will be sent. We hope that this information will allow site operators to more effectively juggle their site visits and their other work demands. In this way we hope to reduce data loss due to overloaded filters.

If operators require more (or less) notice, simply let us know and we can configure the system to email you an earlier or later prediction of 90% loading. Please also keep us upto date about any changes to the recipients (max 3 per site). We are also interested in your feedback so please let us know if you can think of any improvements to the system.

Item date 02/10/2007