This product is no longer available.
VMT2 Geotivity Velocity Sensor
Services Available
Repair No
Calibration No
Free Support No


On November 14, 2008, Campbell Scientific removed the VMT2 from our pricing system because Geotivity, the manufacturer, is no longer producing it. This ultrasonic doppler velocity sensor determined the average velocity in open channels or round pipes. The VMT2 could be combined with a level sensor in a culvert or a fixed channel to calculate flow rate (flow Q= area x velocity). Flow was measured in one direction only.

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Detailed Description

  • Measures flow in one direction only.
  • No restocks or returns
  • Manufactured by Geotivity, Kelowna, British Columbia


Range 0 to 4.5 m/s (0 to 15 ft/s)
Accuracy +2% readings
Temperature Range -20° to +80°C (-4° to +176°F)
Dimensions 5.08 x 5.08 x 1.9 cm (2 x 2 x 0.75 in.)
Weight 2.3 kg (5 lb)


Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR500 (retired) The CR500 requires the SW12V Power Switch Assembly to control power to the sensor.
CR5000 (retired)
CR510 (retired) The CR510 requires the SW12V Power Switch Assembly to control power to the sensor.
CR9000 (retired)
CR9000X (retired)

Additional Compatibility Information

Data Logger Considerations

The CR200(X)-series, CR510, and CR10X can measure velocities up to 2.5 mps directly. The CR800-series, CR1000 and CR3000 can directly measure velocities up to 5.0 mps. If higher velocities are expected, a Voltage Divider (VDIV2:1 or VDIV10:1) is required.

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