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Teledesign TS4000 900MHz UHF/VHF

True cloud-based sensor configuration, logging, reporting and data analysis all-in-one.


Shark (RS232/RS485 Bluetooth Serial Adapter)


A cloud-based interface to configure hardware, visualize data, analyze measurements, manage alarms, calculations, and set up data routing.

MEASUREMENTS TO MIND (M2M) is a growing suite of Stevens products that embraces cloud-computing with an all-inclusive vision of shortening the communication path from the sensors to data on-line. That is, what the sensors MEASURE the MIND sees.

The product finder lets you explore our catalog visually and filter products by type of monitoring, manufacturer, and more.


SOLO (smart SDI-12 power manager)
JL-2 (solar charge controller)
Power Supplies
Solar Panels

Smart SDI-12 power manager that also provides remote power cycling.

The product finder lets you explore our catalog visually and filter products by type of monitoring, manufacturer, and more.

The product finder lets you explore our catalog visually and filter products by type of monitoring, manufacturer, and more.

Hydrolab HL4

Multiparameter sonde


The HL4 is Hydrolab’s next-generation sonde and a replacement for the DS and MS series products.

  • SDI-12, RS-232, and RS-485 communication options
  • Self-monitoring system reports the status of the instrument, flags the data, and shows the user where the problem is with assistance on how to solve the issue
  • User-scheduled calibration and maintenance intervals indicate when they are due
  • Guided and semi-automated calibration routines lead the user through the calibration process
  • Calibration results are stored with date and time, calibration type, user identification, and user notes
  • Check Calibration process allows the user to verify calibration and store the results
  • Calibration reports contain information about previous calibrations and calibration checks
  • Sensor status is saved with every line of data and is contained in the log file
  • Dedicated communications modules allow easy integration with data loggers and telemetry systems
  • Sensors available:
    • Conductivity
    • LDO (luminescent dissolved oxygen)
    • Temperature
    • pH
    • Depth/Vented Level
    • Turbidity
    • ORP (Oxygen Redox Potential)

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What's the Easiest and Quickest Way to Start Collecting Data and Access it Anywhere?

The Answer's in the Cloud.

eTracker is a cellular modem and "virtual" cloud-based data logger in one (meaning you don't need to install a separate data logger). Simply connect your sensor and a power source to eTracker and you're done. Configure (or reconfigure) anytime from any Internet-connected device, and use Stevens-Connect to retrieve your data, or forward it to your favorite software system.

Technical Specifications



6-30 VDC (12 VDC nominal) applied to the communications module, 12 VDC: 250 mW average, 19 W peak


(Optional) Internal alkaline D-cell battery, non-rechargeable.

Sleep mode at 12 V

20 mA


Hydrolab communications modules: USB, SDI-12, RS232, RS485, or TTY


4 GB of internal memory; 1 second interval minimum


Sonde depth rating

200 m (656 ft)

Maximum Deployment Cable

200 m (656 ft)

Diameter without bumpers

4.4 cm (1.75 in.)

Diameter with bumpers

5.3 cm (2.1 in.)

Weight with internal battery pack (IBP) and storage/calibration cup

2.2 kg (5 lb)

Length - no IBP, standard sensor guard

51.4 cm (20.25 in.)

Length - no IBP, extended sensor guard

66.4 cm (26.125 in.)

Length - IBP and standard sensor guard

62.2cm (24.5 in.)

Length - IBP and extended sensor guard

77.8 cm (30.625 in.)

Environmental conditions

Operating temperature

-5 °C to 50 °C (23 °F to 122 °F), non-freezing

Storage temperature

1 °C to 50 °C (34 °F to 122 °F)