Aanderaa RCM Blue Recording Current Meters

The RCM Blue is a rugged self-recording current meter for measuring current speed and direction in freshwater or marine environments.


  • Bluetooth for communications and data retrieval
  • Built-in solid state 3-axis tilt-compensated compass
  • Battery compartments with up to 70Ah
Your Price Call
Stock Check Availability  

The RCM Blue is a self-recording Current Meter which also measures water temperature as standard and pressure as optional. The Doppler Current Sensor is an upgraded version of the proven SeaGuard ZPulse sensor. The instrument configuration and data retrieval is done via Bluetooth, which eliminates the need to open the pressure case for repeated deployments.

The DCS sensors are based on the backscatter acoustic Doppler principle. The DCS has two transducers on each orthogonal axis. This enables the DCS to measure in both directions on each axis which makes it insensitive to disturbance from vortex speeds around the sensor itself and the mooring line when the forward ping feature is enabled. One transducer on each axis transmits short ultrasonic pulses simultaneously (50 to 600 pings in each recording interval). The same transducers receive backscattered signals from particles in the water. This gives an orthogonal x and y speed component which is tilt compensated to find the correct horizontal speed components. The North and East speed components are calculated based on the x and y speed components and the heading from the built-in solid state electronic compass. The sensor takes several of these two-component measurements and finally calculates the averaged north and east speed components and the vector averaged absolute speed and direction.

Another great advantage is the ZPulse technology which improves the statistical precision. Complex acoustic pulses comprising two distinct frequencies which are combined into a single acoustic pulse. The ZPulse based DCS separates the received signal into different frequency bands, one for each frequency in the transmitted signal. Further, it analyses the frequency shift using a high speed Digital Signal Processor using an ARMA (Auto Regressive Moving Average) based parametric model processing algorithm to find the Doppler shift frequencies. This multi-frequency technique reduces the required number of pings needed in order to achieve an acceptable statistical error. The achieved measurement precision is proportional to the inverse of the square root of the number of ping measurements in a measurement interval.

The ZPulse DCS uses two frequencies and this gives a reduction by a factor square root of two compared to a single frequency sensor. A single frequency sensor needs twice the number of ping to achieve the same precision as the Zpulse DCS. The instrument outputs Absolute Current Speed and Direction, Speed in east and north direction, Ping Count, and extensive readout of quality control parameters such as Single-ping Standard deviation, Heading, Tilt in X- and Y-direction, and Signal Strength.

  • RCM Blue Recording Current Meter
  • 1 battery package, alkaline
  • 1 empty battery shell (for e.g. lithium batteries)
  • 2 magnetic tip pens to activate Bluetooth (one located inside the battery container)
  • USB to Bluetooth adapter
  • Configuration software, AADI Real-Time Collector
  • Data visualization and analysis Software, Aanderaa Data Studio.
  • Documentation CD including operating manuals and SW installation files
Questions & Answers
No Questions
Did you find what you were looking for?

Select Options

  Products 0 Item Selected
Part #
Aanderaa RCM Blue Recording Current Meters
RCM Blue Recording Current Meter, 0-3m/s
Request Quote
Check Availability  
Aanderaa RCM Blue Recording Current Meters
RCM Blue Recording Current Meter, 0-10m/s
Request Quote
Check Availability  
  Accessories 0 Item Selected
Notice: At least 1 product is not available to purchase online
Multiple Products

have been added to your cart

There are items in your cart.

Cart Subtotal: $xxx.xx

Go to Checkout

In The News

Remote Water Quality Monitoring with the Oklahoma Water Resources Board

Growing up surrounded by water, whether it be rivers or streams, lakes or ponds or right on the coast of the ocean, it can be easy to forget that clean water is a limited resource. For many, turning on the tap means potable, running water—“You’re not really thinking, ‘well this comes from a reservoir,’” explains Sarah Dexter, an Environmental Program Supervisor with the Oklahoma Water Resources Board (OWRB). The OWRB monitors various waterbodies throughout Oklahoma, and Dexter works specifically with rivers and streams, which has placed her on several projects involving dams and stormwater monitoring.

Read More

Data-Driven Decisions: Tracking Sediment during the Klamath Dam Removal

The largest dam removal in U.S. history, the deconstruction of the Klamath Dam is slated to begin this summer. The project includes four dams along the Klamath River with the first and smallest dam, Copco #2, scheduled for removal first. As each of the dams are torn down, scientists and consultants will keep a close eye on the state of the Klamath River downstream to assess the impact of undamming the river. Shawn Hinz, managing partner and environmental toxicologist with Gravity Consulting , has been involved with the Klamath Dam project for over a decade. Hinz was a part of these earlier steps, representing the academic stakeholder position as a graduate student sitting on a board of other stakeholders.

Read More

From the Tap: Source Water Monitoring for Public Health

In regions with historically secure access to clean drinking water, few think about the work that goes into ensuring that the water they fill their cups with is safe. In reality, millions of dollars are invested in the infrastructure, equipment and teams involved in converting source water into drinking water. While all the work that goes into providing clean water often goes unnoticed, analysts like Michele Gilkerson, a water research analyst with the City of Columbus Division of Water, know exactly how much goes into securing safe water for millions of people. Gilkerson started with Battelle Memorial Institute in 1991 in their water ecology section. There, she saw how interesting source water monitoring could be, even though it isn’t often spotlighted in the environmental sector.

Read More