Inexpensive open source data loggers and sensors for water levels and hydrologic measurements in least developed countries Document 12 July 2021 The Case Study presents the innovation project implemented in the framework of the WMO HydroHub Second Innovation Call in Afghanistan and Bhutan.Implementation dates: December 2018 to May 2021 Innovation supplier: Northern Widget Project implementation country: Afghanistan and Bhutan Download document Share: Document type: Case study