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TCM-3 Deep Water Current Meter

The TCM-3 is a current meter that is designed to operate off the continental shelf in water up to 4500m depth
Part Number: TCM-3
Delivery date: 2-3 weeks
$5,915.00 ex GST
[$6,506.50 inc GST]
Product Files

TCM-3 Tilt Current Meter

The TCM-3 is a current meter that is designed to operate off the continental shelf in water up to 4500m depth. The TCM-3 is constructed from toughened syntactic foam with a titanium pressure housing and is easily deployed by small ROVs. The relatively low cost make it feasible to accurately measure current in many locations simultaneously.

The core of the TCM-3 is the MAT-1 Data Logger.  The MAT-1 data logger was designed for NOAA and is ideally suited as the "brains" of a tilt current meter. The built-in data logger includes a USB communication interface, a microSD flash memory card, and a long-life lithium battery. 
 

Operation

The TCM-3 Tilt Current Meter measures current using the drag-tilt principle. The logger is buoyant and is typically attached to the bottom via a short flexible tether to a small lead or concrete anchor. Moving water tilts the logger in the direction of flow. The TCM-3 contains a 3-axis accelerometer and 3-axis magnetometer for measuring tilt and bearing. The resulting orientation data is converted to current by applying calibration coefficients with the included software.

  


 

Key Features & Benefits

  • Water velocity for a fraction of the cost of an acoustic meter
  • Tilt compensated compass for bearing measurements
  • Simple & rugged design is easy to deploy from a ROV
  • Internal temperature sensor is accurate to +/-0.1C
  • 4 GB memory card eliminates memory concerns
  • Lithium battery allows continuous 4Hz sampling for more than 1 year
  • USB 2.0 with standard cable and drag and drop data file offload
  • Easy meter configuration and data conversion with Windows® software (free download).

Package Contents

  • TCM-3 Tilt Current Meter
  • Lithium battery (installed in logger)
  • 4 GB microSD card (installed in data logger)
  • 1 m (3 ft) USB A to micro-B Cable
  • Spare O-ring (pre-lubricated)
  • 30 cm (12") lanyard

TCM-3 Tilt Current Meter

The TCM-3 is a current meter that is designed to operate off the continental shelf in water up to 4500m depth. The TCM-3 is constructed from toughened syntactic foam with a titanium pressure housing and is easily deployed by small ROVs. The relatively low cost make it feasible to accurately measure current in many locations simultaneously.

The core of the TCM-3 is the MAT-1 Data Logger.  The MAT-1 data logger was designed for NOAA and is ideally suited as the "brains" of a tilt current meter. The built-in data logger includes a USB communication interface, a microSD flash memory card, and a long-life lithium battery. 
 

Operation

The TCM-3 Tilt Current Meter measures current using the drag-tilt principle. The logger is buoyant and is typically attached to the bottom via a short flexible tether to a small lead or concrete anchor. Moving water tilts the logger in the direction of flow. The TCM-3 contains a 3-axis accelerometer and 3-axis magnetometer for measuring tilt and bearing. The resulting orientation data is converted to current by applying calibration coefficients with the included software.

  


 

Key Features & Benefits

  • Water velocity for a fraction of the cost of an acoustic meter
  • Tilt compensated compass for bearing measurements
  • Simple & rugged design is easy to deploy from a ROV
  • Internal temperature sensor is accurate to +/-0.1C
  • 4 GB memory card eliminates memory concerns
  • Lithium battery allows continuous 4Hz sampling for more than 1 year
  • USB 2.0 with standard cable and drag and drop data file offload
  • Easy meter configuration and data conversion with Windows® software (free download).

Package Contents

  • TCM-3 Tilt Current Meter
  • Lithium battery (installed in logger)
  • 4 GB microSD card (installed in data logger)
  • 1 m (3 ft) USB A to micro-B Cable
  • Spare O-ring (pre-lubricated)
  • 30 cm (12") lanyard

TCM-1 Current Meter Overview

This video is a quick look at the new TCM-1 current meter from Lowell Instruments. In this example the TCM-1 is deployed in a tidal stream at the outlet of a salt marsh. The depth is about 1 meter, the tide is fairly low, but continues to fall, and the current is about 50 centimeters per second or 1 knot. The meter is anchored to the bottom by a short flexible tether and a 5 kilogram lead weight. The TCM-1 measures current via the drag-tilt principle. The meter records its orientation using a three-axis accelerometer and three-axis magnetometer up to 64 times per second. The orientation data is stored internally on a SD card. The data is filtered and post processed to determine current speed and bearing. The meter has sufficient battery and memory to record current velocity for months to years depending on recording rates.

MAT Logger Commander Software is used to control Lowell Instruments' Loggers. The software is used to set up and control the logger (via a USB connection).  The software is also used to convert the data files from a binary format into a simple text file that can be opened by spreadsheets and other third-party software.

Download »

Setup Logger for Deployment

  • Specify a deployment description
  • Choose recording intervals from 1 hour to 1/64 of a second
  • Program start and stop times
  • Enable or disable the LED
 

Start, Stop and Check Sensor Readings

 

  • View logger orientation in real-time via USB
  • Start and stop logging
  • Check magnetometer, accelerometer and temperature sensor values
  • Check and set the logger's clock
 

Convert Data Files to Text Files

  • Convert binary data files to text files
  • Choose time format
  • Split files into smaller files
  • Apply custom calibration coefficients
  • Convert pitch and yaw to current and direction for Tilt Current Meters
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