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Hydrolab HL7 - Multiparameter Sonde

Water Quality Measurement Instrument

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.

  • Attended, Unattended
  • Temperature, Conductivity, Depth, pH, Dissolved Oxygen (LDO), Turbidity, ORP, Blue-Green Algae, Chlorophyll a
  • The next generation multiparameter water quality instrument
  • SDI-12, RS-485, RS-232, TTY, USB
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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
Communication Module Wiring - 6748600, 9039600, 9039700, 9039800, 9312900
HL Series Sensors - Bedienungsanleitung | User Manual | Manuel d'utilisation | Manual de usuario
HL Series Sonde - Bedienungsanleitung | User Manual | Manuel d'utilisation | Manual de usuario
Hydrolab Standard Methods Sheet
Leaflet - Multiparameter-Sonde Water Quality Hydrolab HL Series
Water Quality Solutions Overview Video
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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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