336 Mountain Way Drive
Orem, UT 84058 U.S.A.
Telephone: (801) 225-8970
Fax: (801) 225-9008
E-mail: info@gmheng.com

Delta DRS1000 Non-Contact Speed Sensor
speed sensor   The Delta Speed Sensor is a non-contact Doppler radar speed sensor suitable for a wide variety of speed measurement applications. Small and lightweight, it requires only a small DC power source, making it useful in situations requiring portability or remote sensing.

The sensor may be placed on a moving vehicle to measure vehicle ground speed. It may also be used in a stationary mounting to measure the speed of a moving object which can be anything from a thin wire passing under the sensor to a vehicle 300 meters away. The output of the sensor is a pulse with a frequency proportional to the measured speed. The cumulative number of pulses may be used to determine distance traveled or the length of a moving surface.

The sensor can be used with GMH Engineering’s SRO100 Digital Display which provides a real-time readout with programmable engineering units. GMH Engineering also offers, as an accessory, a PCMCIA Digital I/O Card with software so that the output of the sensor may be displayed, recorded or graphed on a computer. The speed sensor may also be used with many different types of off-the-self hardware such as timer/counters or digital tachometers. Or, it can be integrated into electronic control or data acquisition systems.


Typical Applications

  • Vehicle ground speed measurement
  • Amusement park ride testing
  • Motion sensing
  • Speed control
  • Traffic monitoring
  • Length or distance measurement
  • Racecar performance tuning


  • Non-contact speed measurement
  • Fast response time
  • Accurate
  • Measures from 0.5 to 300 mph (0.8 to 480 kph)
  • Small – lightweight - portable
  • Weather resistant


Output   Maximum Target Distance
  • 0 to 5 V square wave, differential or single ended
  • 100 pulses per mph (62.1 pulses per km/h)
Distance Graph
Update Period
  • 0.01 seconds
Speed Measurement
Range: 0.5 to 300 mph (0.8 to 480 km/h)
Total Unadjusted Error:±0.34% at 1 mph*
*Error increases 0.0023% for every 1 mph increase in speed. For example, at 2 mph, the error increases
to ±0.3423%. At 60 mph, the accuracy is ±0.48%. Overall accuracy of the speed measurement is also influenced by external factors with may include sensor alignment, vibration, clutter, etc.


Maximum target distance is determined by the size and shape of the target. The sensor can see a normal size car at about 1000 feet (300 meters).
Sensor Response Microwave Characteristics
  • Update period: 0.01 seconds
  • Locking Latency: 0.02 seconds
  • Unlocking Latency: 0.05 seconds
  • Sensor time constant: 0.025 seconds
  • Frequency: Ka Band – 35.5 ± 0.1 GHz
  • Beam Divergence Angle: 6º from center
  • Average RF Power: 0.02 W maximum
  • Effective Radiated Power: 0.98 W
Power Supply 10.5 to 16.5 VDC, 2.4 W   Note: The sensor’s transmitted signal is regulated under FCC regulations Part 90, subpart F. Please contact GMH Engineering for registration details.
Temperature Range 0 to 140º F (-17 to 60º C)  

Enclosure Weather resistant

  Weight 0.5 lbs. (230 g)
Wiring Red = + Power; Black = - Power; Green = + Signal; White = -Signal

Accessories Available:

Adjustable Angle Mounting Bracket with Magnetic Mounting
Fixed Angle Mounting Bracket
Digital Display

Data Sheets Available:

Distance Applications Using the Doppler Radar Non-Contact Speed Sensor

Please contact GMH Engineering for price and delivery. (801) 225-8970 or info@gmheng.com

Information furnished by GMH Engineering is believed to be accurate and reliable. No responsibility is assumed by GMH Engineering for its use, whether correct or incorrect. Nor can GMH Engineering be held liable for consequences for any infringements of patents or other rights of third parties which may result from its use. Information in this document is current as of date of writing and is subject to change. Test data are representative of sensor performance under specific test conditions. Actual performance will vary with application and environment.