HL7 Multiprobes

The new HL7® multiparameter sonde maximizes deployment life, minimizes maintenance, and provides unmatched ease of use producing comprehensive and valuable data sets supported by metadata.

HL7 1
HL7 2

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

Available Sensors:

  • Temperature, Conductivity, pH, ORP,  LDO (Luminescent Dissolved Oxygen), Depth, Turbidity, Blue Green Algae, Rhodamine and Chlorophyll A.


  •  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)

          © Hydrotech ZS Consulting 2022