OTT HydroMet

- Model HYDROLAB HL7 - Multiparameter Water Quality Sonde



The HYDROLAB HL7 multiparameter sonde offers a versatile, durable and practical solution to the day to day needs of monitoring programs for both simple and complex deployments. With a large sensor suite, it is able to thrive in demanding environmental conditions for long term continuous and profile monitoring.

Bio-fouling is minimized when equipped with the central cleaning brush and performance is maximized with an advanced power management system. It has a temperature sensor, seven external sensor ports and an optional internal depth sensor. 

It helps our customers to correctly log data autonomously and easily integrate into real time telemetry systems. 

  • Product type: Attended, Unattended
  • Parameters measured: Temperature, Conductivity, Depth, pH, Dissolved Oxygen (LDO), Turbidity, ORP, Blue-Green Algae, Chlorophyll a
  • Product Highlights: The next generation multiparameter water quality instrument
  • Interface: SDI-12, RS-485, RS-232, TTY, USB

Practical and effective handling of instrument for field use

  • Quick and simple battery cartridge removable
  • Bail design aids instrument handling, transport and secure deployment options
  • Color coded status indicators to know the battery power source is working properly
  • USB for quick data transfer to rugged tablets and field laptop

Durable construction that delivers all day every day operation

  • Keyed cable connector design ensures alignment and connectivity
  • Recessed bulkhead connectors protect pins in the event of impacts
  • Independently sealed built-in battery compartment
  • Kevlar reinforced deployment cable for demanding continued usage
  • External power option

Designed to withstand long term continuous use and integration with data loggers and data acquisition systems

  • User configurable communication modules for simplified integration
  • SDI-12 and RS485 Modbus for reliable data transfer
  • Typical battery life capable of greater than 90 days deployment
  • Field proven sensor measurement technology for data continuity and serviceability
  • HYDROLAB Operating System helps to make better decisions, minimize errors, and increases efficiency in the lab and on the deployment site.
  • Quickly view the current status of the instrument and ensure its working properly
  • Plot current and historic data with multiple graphics and table formats options
  • Maximize uptime with streamlined calibration tasks

  • Lake and Reservoir profiling
  • River and Stream surveys
  • Coastal monitoring
  • Groundwater studies
  • Wetland management
  • Harbor and Port investigations
  • Aquaculture protection
  • Dredging management
  • Effluent discharge regulation
  • Agricultural run-off
  • Ecosystem assessment programs

  • Sensor Ports : 9 sensor ports available
  • Dimensions : Diameter: 8.9 cm (3.5 in.) without rubber bumpers; 9.8 cm (3.85 in.) with rubber bumpers
  • Length: 66.4 cm (26.1 in.)
  • Weights: 4.5 kg (10 lb) with four Dcell batteries, storage/calibration cup with no liquid
  • Power Requirements: 6...24 VDC (12 VDC nominal) applied to the communications module, 12 VDC:2.0 W average, 24 W peak
  • Battery Life* : 90 days
  • Operating Temperature : -5 to 50 °C (23 to 122 °F), nonfreezing
  • Storage Temperature : 1 to 50 °C (34 to 122 °F)
  • Depth : 200 m (656 ft) maximum
  • Data Memory : 4 GB
  • Tensile strength : (Maximum) Mooring cap: 68 kg (150 lb); deployment cable: 227 kg (500 lb)
  • Communications : Communications module: USB, SDI12,RS232 Modbus, RS485 Modbus and RS232 TTY
  • Sampling Rate : 1 Hz minimum, (once per second)

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