OTT Hydromet Hydrolab HL4 water quality instrument

The Hydrolab HL4 is a multiparameter water quality instrument from OTT Hydromet. Its ease of use and metadata are said to produce water quality data the user can trust.

A self-monitoring system reports the status of the instrument, reveals where potential problems are and gives assistance on how to solve issues. User-scheduled calibration intervals indicate when calibration is due, guided and semi-automated calibration routines lead the user through the calibration process and a check calibration procedure can be used to avoid a complete calibration. A sensor status that is saved with every line of data and calibration reports store information about previous calibrations, enabling valid, scientifically defensible conclusions to be produced.

The product connects to rugged deployment cables and the Surveyor HL for attended monitoring applications that require equipment designed for field use. The Surveyor HL is a lightweight, compact, fully IP67 handheld with a full-colour screen that is visible in bright sunlight. For unattended continuous monitoring applications, the device has onboard data logging and dedicated communications modules that are used for easy integration with external data loggers and telemetry systems.