Hydrolab Surveyor HL Handheld

Compact size, color display

The Surveyor HL is the handheld display that connects to the Hydrolab HL4 for attended monitoring applications and for completing other common tasks with the sonde in the field. It is rugged and compact with a color screen that is visible in direct sunlight and a keypad with pronounced buttons for system navigation.

The menu structure and functions are modeled after the Hydrolab Operating Software to make it easy to use and provide feedback about the system’s status and access to onboard metadata. The Surveyor HL is powered by a rechargeable lithium-ion battery that holds enough energy to power a Hydrolab HL4 for 10 continuous hours.


  • Fully IP67 enclosure with hand strap and rubberized case for optimal grip
  • Threaded connector to securely attach the sonde deployment cable
  • Color LCD 3.5 inch QVGA display visible in direct sunlight
  • Rechargeable lithium-ion battery that can power an HL4 for 10 continuous hours


Click here to visit the download site for the SurveyorHL firmware


Hydrolab HL4 Operating Software – Calibration – Video
Hydrolab HL4 Operating Software – Monitoring and Logging – Video
Hydrolab HL4 Overview Video
Hydrolab HL4 Overview Video
Hydrolab HL4 Reviews
Hydrolab HL4 Reviews
Hydrolab Operating Software – Overview
Leaflet Hydromet Cloud EN
Survey HL Handheld Manual

Technical Data

Graphical Display Color, LCD 3.5 in. QVGA
Graphical Display Transflective (readable in direct sunlight)
Power Supply Lithium-ion rechargeable
Battery Life Up to 10 hours (20 °C) continuously on*

*Temperature, conductivity, pH, and LDO sensors installed. Configuration dependent.

IP Rating IP67*

*Connector covers and/or deployment cable recommended

Buoyancy Positively buoyant in water
Dimensions L x W x H: 21.8 cm x 9.4 cm x 5.3 cm (8.6 in. x 3.7 in. x 2.1 in.)
Weight 0.68 kg (1.5 lbs)
Operating temperature –5 to 50 °C (23 to 122 °F)
Storage temperature –20 to 60 °C (–4 to 140 °F)
Barometric Pressure (Range) 225 mmHg – 825 mmHg
Barometric Pressure (Accuracy) +/- 1 mmHg
Barometric Pressure (Stability) +/- 0.75 mmHg over 12 months
Maximum Deployment Cable 200 m (656 ft)
Material Polycarbonate with thermoplastic elastomer (TPE) overmold

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