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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.


Pressure transducer with integrated logger


The OTT PLS measures water level, depth of water, or pressure by means of an integrated controller and ceramic pressure-measuring cell. Design features such as multiple communication outputs (SDI-12 or 4-20 mA), stainless steel housing, and a rugged cable make this sensor ideal for monitoring water level in a variety of applications.


  • The robust ceramic pressure cell offers industry-leading accuracy and does not deform over time like membrane technology, providing long-term measurement stability
  • Rugged design: Ceramic pressure cell resistant to physical force (5 x burst pressure) and enclosure made of high-quality saltwater resistant steel for use in coastal environments
  • Built-in microcontroller–compensates for temperature effects and applies correction values for gravitational acceleration and water density
  • Vented pressure probe, automatically compensates for changes in barometric pressure
  • Robust cable with Kevlar core for length stabilization and capillary tube for venting
  • Simple setup and connection to external dataloggers using SDI-12 or 4-20 mA interfaces
  • Optimized resolution is achieved by assigning the 4-20 mA to that part of the measuring range that is actually required
  • Water temperature output in addition to water level (for SDI-12 output)

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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

Waterlevel measurement

Measuring ranges

0-4 m, 10 m, 20 m, 40 m, 100 m

Accuracy, pressure sensor

SDI-12: ±0.05 % FS (linearity and hysteresis)
4-20 mA: ±0.1 % FS (linearity and hysteresis), 10 ppm/°C at 20 °C

Resolution (SDI-12)

0.001 m; 0.1 cm; 0.01 ft; 0.1 mbar; 0.001 psi

Temperature compensated working range

-5 °C to +45 °C (ice-free)

Temperature measurement

Measuring ranges

-25 °C to +70 °C (ice-free)

Accuracy, temperature

±0.5 °C / ±0.9 °F

Resolution, temperature

0.1 °C / 0.1 °F


Available interfaces

4-20 mA, SDI-12, RS485 (via SDI-12 protocol)

Supply voltage

+9.6 to +28 VDC, typically 12/24 VDC

Power consumption (SDI-12)


<600 µA


<3.6 mA

Pressure sensor

(capacitive pressure sensor) ceramic, temperature compensated, overload safe for up to 5 times the measuring range without permanent mechanical damage

Temperature sensor




195 mm x 22 mm


approx. 0.3 kg


Housing: stainless steel 1.4539 (904L) resistant to sea water
Seals: Viton Cable jacket: PUR

Protection type


Mechanical strength

meets the mechanical shock tests of IEC 68-2-32

Environmental conditions

Operating temperature

-25 °C to +70 °C

Storage temperature

-40 °C to +85 °C