Tender Notice – INVITATION FOR BIDS (IFB) Tender Notice – INVITATION FOR BIDS (IFB) The Supply, Installation, Testing, Commissioning and Maintenance of Digital Water Level Recorders (DWLRs) (hydrostatic pressure type) with Telemetry in the Piezometers of Ground Water Department in Kerala and integrate with Data Center located in Ground Water Department, Thiruvanathapuram, Kerala