Surveying, hydrographic, oceanographic and hydrological instruments and appliances

Tender description

Equipment items are required to support elements of the ‘Source to Tap’ INTERREG VA funded project. This project aims to support drinking water source protection in Irish/Northern Irish cross-border catchments with interventions designed to mitigate issues with water colour (as dissolved organic matter), sediment (as turbidity) and pesticides. Requirements. Five (5) water quality sondes. (Further details are contained within the ITT Package (Invitation to Tender Package). 5 x water quality sondes. Essential requirements are: —— Primary measurement parameters are fDOM/CDOM and turbidity. — Ability to measure fDOM/CDOM in the range for British/Irish rivers at all flow conditions and in shallow groundwater. The minimum measurement range should be at least 0-300 ppb QSU (quinine sulphate units) (or equivalent) and the minimum detection limit should be 0.1 ppb QSU (or equivalent) or less. — Ability to measure turbidity in the range for British/Irish rivers at all flow conditions. The minimum measurement range should be at least 0-1,500 NTU (or equivalent) and the minimum detection limit should be 0.5 NTU (or equivalent) or less. — An accuracy within the measuring range never exceeding ±5 % of readings and preferably lower. — Resolution across the measuring range of less than 1 NTU (or equivalent) for turbidity and less than 1 ppb QSU (or equivalent) for fDOM/CDOM. — Anti-fouling/auto-cleaning wiping capability for extended (minimum one month between maintenance visits) deployments in ambient surface waters (rivers) and shallow groundwater. — Operating temperatures in river water for deployments between at least -2°C (or lower) and 40°C (or higher). Temperature should be a logged parameter. — Capability for deployment in rivers to at least 5m depth (below the surface). — Powered by batteries with sufficient capacity to monitor the primary parameters on (at least) an hourly basis for (at least) one month deployments. — Sufficient internal memory capacity to log the primary parameters on (at least) an hourly basis for (at least) one month deployments. — User must be able to calibrate the sondes. — Cables (or wireless equivalent; if cable, MUST connect via USB port) and software for data download, calibration and programming via laptop computer running Windows 10. — Ability to use for real-time monitoring. — Full instructions for use, maintenance, calibration and data downloading. — Guarantees/warranties for normal use in surface water or groundwater environments.