Sensor Fish (ARC800)

 The Sensor Fish is a small autonomous device that analyzes the physical conditions fish experience as they pass through dams and other hydro structures. This synthetic “fish” is helping existing hydroelectric dams, and new, smaller hydro facilities become more fish-friendly. The measurements derived from Sensor Fish can improve the environmental performance of hydro-power. 


  • Hydro turbines such as Kaplan, Francis, and gravitation water vortex turbines
  • Small hydro-power, pumped storage hydroelectric facilities
  • Spillways, irrigation structures, and pumping stations

On-board Sensors

  • Temperature
  • Pressure
  • Acceleration
  • Gyroscope, to measure stresses place on small fish


Data Recorded

  • Approximately 5 minutes of data with flash memory (turbine passage is usually less than 2 minutes)
  • 2,048 measurements per second
  • Up to 174 pounds per square inch of pressure


  • Acceleration up to 200 times the force of Earth’s gravity (200 Gs)
  • Temperatures between -40 and +260 degrees Fahrenheit


Neutrally buoyant. Automatically floats to surface at end of test by dropping a small pair of                    environmentally-friendly weights


Four multi-color LED lights for diagnostics and status


An integrated VHF Transmitter can be tracked in order to retrieve the Sensor Fish

Physical and Sensor Specifications

Physical Dimensions   89.9 x 24.5 mm

Density                                      1.01 mg/mm³

Excess mass (wet weight)       0.5 g

Sensor Sampling rate           2048 Hz

Maximum sampling time            4 min

3D acceleration                   0 - 200 g

3D rotational velocity       0 - 2000 ˚/s

Pressure                               0 - 203 psia

Temperature sensor       -40 - 125 ˚C