Stevens Water is pleased to announce an alliance with Schlumberger Water Services to bring the popular suite of Diver pressure sensors with internal data logging to new markets and customers in the United States.

The cost-effective Diver family of sensors includes unique configurations for monitoring water level and temperature, as well as a new Diver that includes pressure, temperature, and conductivity measurements. All Diver sensors include an internal datalogger and an integrated battery that can provide up to 10 years of continuous operation. Furthermore, the Diver family now includes an optional SDI-12 (serial digital) interface and wireless communication features.

The small size of the Diver sensors is ideal for long-term, low-impact measurement in groundwater wells, monitoring municipal water supplies, salt water intrusion studies, brine storage and migration, and environmental monitoring of contamination and remediation projects.

All five Diver units are available now from Stevens Water, in addition to accessories for data download and communication.

Visit the Stevens website or call Stevens at (800) 452-5272 / (503) 445-8000 for more information about how the Diver line of sensors can be used in your application.

An original 1926 “Leupold, Volpel & Co.” Type A Chart Recorder, on display at the Stevens office.

The Stevens Water "100 Year Anniversary Contest" is still going strong, with several submissions that have suprised the staff here at the Stevens Water office.

Darrell Hedin, the District 18 Watermaster in Hillsboro, Oregon holds the current record for the oldest piece of Stevens equipment still in operation: a Stevens A-35 Chart Recorder, manufactured in 1938 that is still being used in one of their gaging stations! That would make the recorder 73 years old, and still going strong!

1938 Stevens A-35 Chart Recorder, still in use today.

Do you have a piece of classic Stevens equipment that is still in use? Read about the contest and submit your entry!

The contest will be open for the remainder of 2011, with prizes to be awarded for the oldest Stevens equipment still in use.

This can include equipment branded with “Leupold, Volpel & Co.”, “Leupold & Stevens”, or “Stevens Water Monitoring Systems”.

Please send entries to info@stevenswater.com, and be sure to include a description and any photos you may have.

Now available from Stevens Water is the Stevens pF Sensor, a soil sensor that measures the “matric potential” of the soil. Also called “soil water potential”, a soil’s matric potential is the force with which water is held within the soil and how much energy is needed to overcome this force to extract water from the soil. Matric potential changes with the soil water content percentage and the matric potential characteristics are highly variable from one soil type to the next. Matric potential is usually expressed in units of pressure. pF is the log of the pressure in Hectopascals (hPa). 1 hPa = 100 Pa.

The Stevens pF Sensor uses unique technology that first measures the heat capacity of soil. The heat capacity of the soil is correlated to the soil matric potential. Calculating matric potential from the heat capacity is more reliable and accurate that other methods such as granular matrix or potentiometers. The pF Sensor has a range from 0 to 7. The Stevens pF sensor can be used with the Stevens Hydra Probe to fully measure the hydrological conditions of the soil.

Reading the pressure needed to extract water from soil is useful in many fields, including plant and soil sciences, and can be used to determine plant-available water for crop growth, as just one example.

Visit the Stevens Website to learn more about the Stevens pF Sensor and how it can be used in new or existing soil monitoring applications for even greater measurement accuracy.

Did you know? Stevens Water offers a full catalog and resource guide, available to browse or to download from our website.

The Stevens Catalog and Resource Guide is packed with 200 pages of product information, installation tips, and technical details covering topics such as radio telemetry technology, soil analysis, and more. Tables for unit conversions and weir/flume measurements calculations for all common geometries are also available.

Visit the Stevens Water website to view the catalog, which may be saved to your computer or printed for offline reference.

Stevens Catalog contents:

1. Data Loggers and Acquisition Systems
2. Telemetry and Data Communication
3. Data Management Software
4. Water Level Monitoring
5. Water Quality Monitoring
6. Soil Monitoring
7. Weather Sensors

Stevens Resource Guide contents:

1. Radio and Data Communication
2. Soil Monitoring
3. Conversion Tables
4. Flow Equations for Weirs and Flumes