Tip: if you're looking for drivers, manuals, or other technical support resources, search in the Stevens support site instead.




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.

Van Essen Instruments Cera-Diver

Pressure transducer with integrated logger

Part # 51144-7


The ceramic Cera-Diver is designed specifically for monitoring groundwater in potentially corrosive conditions, such as brackish water and seawater.

The Cera-Diver is available in four ranges for monitoring the following depths:

  • 0 - 33 ft (0 - 10 m)
  • 0 - 66 ft (0 - 20 m)
  • 0 - 164 ft (0 - 50 m)
  • 0 - 328 ft (0 - 100 m)
Measuring 3.54 inches (90mm) in length and 0.86 inches (22mm) in diameter, this highly reliable and compact Diver registers groundwater levels with an accuracy of 0.05% (Full Scale). It is equipped with a memory capable of storing 48,000 measurements per parameter. This is sufficient enough to perform one measurement every ten minutes for an entire year.

In addition to internal data storage, the Cera-Diver can be connected to an external data logger, such as the Stevens DataLogic 3000, or data telemetry systems with the Diver-SDI SDI-12 output adapter, allowing the Diver to be used for real-time data monitoring applications.

Manual data download in the field from a Diver's internal storage can be done by utilizing the optional USB Interface Cable and connecting the diver directly to a desktop or laptop PC.

Shop Online

Related products

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


Internal Battery, 10-year life with "typical" use

  • 5 million measurements
  • 2,000 readout cycles
  • 2,000 programming cycles

Sample interval

0.5 seconds to 99 hours

Data output options

  • SDI-12 when connected to Diver-DCX converter box
  • Manual data download using USB interface cable connected to computer
  • Manual data download using "Diver Mate" or "Diver USB Reading Unit" accessories

Conductivity Measurement

Range: 10 µS/cm to 120 mS/cm
Accuracy: ± 1.0% of reading
Resolution: ± 0.1% of reading

Operating temperature, compensated

32 °F to 122 °F (0 °C to 50 °C)

Temperature accuracy

± 0.18 °F

Temperature resolution

0.018 °F

Wetted parts materials

Housing: ceramic (ZrO2)
O-rings: Viton®
Pressure sensor: ceramic (AI2O3)
Cap / nose cone: Nylon PA6 30% glass fiber

Physical size

3.54 in (L) x Ø 0.86 in (90 mm x Ø22 mm) including suspension eye


1.94 oz (55 grams)

Depth Range Typical Accuracy Long-Term Stability Resolution
33 ft (10 m) ±0.05% FS ±0.1% FS 0.07 in (0.2 cm)
66 ft (20 m) ±0.05% FS ±0.1% FS 0.15 in (0.4 cm)
164 ft (50 m) ±0.05% FS ±0.1% FS 0.39 in (1 cm)
328 ft (100 m) ±0.05% FS ±0.1% FS 0.78 in (2 cm)