Instrumentation
We offer a variety of products that can be used to create systems for Water Level and Flow. Many of the major components used to create these systems are listed below. Please let us know if we can help you configure a system.
More Details about Our Water Level and Flow Systems
Measuring Water Level
Our systems use 6-wire resistive gages or vibrating-wire pressure transducers for measuring groundwater level. In deep observation wells, these pressure transducers provide accurate water level measurement. We use piezometers, bubblers, or float and pulley systems to measure water level in shallow water applications. On the high end of groundwater level measurements, our portable pump and slug test systems can simultaneously measure water level in up to 8 wells, yet are easy to setup and customize from site to site.
For surface water level, measurements are often made in a vertical stand-pipe (stilling well) installed adjacent to a lake, river, or stream. The stream level (stage) is the same as the water elevation in the stilling well. A float and pulley is often used, but pressure transducers, ultrasonic, and resistive tape sensors work well also. Self-calibrating double bubblers are accurate sensors for measuring water level, and have the added benefit of keeping the sensor out of the measured liquid—critical in corrosive environments.
Measuring Water Flow
Water flow is usually calculated using a structure built across an open channel, such as a weir or flume. The water level is measured as it flows through the structure. Discharge rates are determined by using a site-unique rating curve and the water level. A float and pulley system, strain gage pressure transducer, or ultrasonic sensor may be used in stilling wells to measure water level fluctuations, then calculate flow.
New sensors that use ultrasonic and Doppler technologies to measure water velocities in two or three dimensions are also available. Velocity is measured directly; additional calculations are not required.
Data Loggers for Water Level and Flow Measurements
The versatility of our data loggers allows systems to be customized for each application. A range of data loggers, with increasing capabilities, is available. All our data loggers feature wide operating temperature ranges, low power consumption, and the ability to directly interface with a large variety of sensors. Because our data loggers operate on batteries (with or without solar panels), they are ideal for long-term, stand-alone operation, such as at remote stilling wells. If additional channels are needed, most of our data loggers are expandable using multiplexers and other peripherals. Powerful on-board instruction sets allow unattended control decisions based on time or conditional events. For example, if measured levels are outside a predetermined range, the data logger can sound alarms, open valves or gates, or call out to a phone to report conditions. Data are typically displayed and stored in the desired units of measure (e.g., cfs, psi, feet, inches, meters, centimeters).
Sensors for Water Level and Flow Measurements
Thanks to their ability to measure multiple channel types, our data loggers can read nearly every commercially available sensor, allowing systems to be customized for each installation. We offer a variety of water level and flow sensors that feature low drift and high reliability. In addition, nearly all available water quality and meteorological sensors can be measured, generally without external signal conditioning. We helped create the original SDI-12 standard, so you can be sure our systems are SDI-12 compatible.
Communications
The availability of multiple telecommunications and on-site options for retrieving data also allows systems to be customized to meet exact needs. Off-the-shelf telecommunications options include satellite (DCP), radio, telephone, cellphone, and voice-synthesized phone. Systems can be programmed to send alarms or report site conditions by calling out to computers, phones, radios, or pagers. Real-time or historical data can be displayed or processed with Campbell Scientific software. Data can also be exported as ASCII files for further processing by spreadsheets, databases, or analysis programs.
Case Studies
In August 2012, RESPEC was contracted to provide field instrumentation and early-warning monitoring services at......read more
Monash University, together with the Bureau of Meteorology, Melbourne Water and Wageningen University (The Netherlands),......read more
In April of 2015, Sandia National Laboratories (SNL) contracted with Montrose Air Quality Services (MAQS)......read more
Overview The existing port of Limon was constructed over 30 years ago. With the increase of......read more
ALERT2 is a modern communication protocol that improves upon 40 years of tradition within the......read more
The Yuba County Water Agency (YCWA) needed to upgrade an unsupportable hydrologic supervisory, control, and......read more
RESPEC, a water-resources consulting and services firm, is currently under contract to operate and maintain......read more
Currently, the Andean tropical glaciers are in an accelerated process of retreat. These glaciers are......read more
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Frequently Asked Questions
Number of FAQs related to Water Level and Flow: 1
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Most Campbell Scientific systems are built from individual components. This provides maximum flexibility for our customers, but it does not lend itself to pricing a "typical" system. Contact Campbell Scientific for assistance in pricing a system to meet the unique needs of the application.
Associated Links
Articles and Press Releases
Press Releases
- New Pressure Transducers with Integrated Campbell Scientific Recording Sensor 14-05-2013
- New High-Accuracy Submersible Pressure Transducers 05-04-2010
- New Submersible Pressure Transducers Manufactured by Leader in Measurement Instrumentation 31-03-2009
- More Versatile Channels, Increased Memory: Campbell Scientific’s CR1000 Datalogger 06-09-2005
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Customise a System
In addition to our standard systems available, many of the systems we provide are customised. Tell us what you need, and we’ll help you configure a system that meets your exact needs.