Sequoia Scientific


Particle size analyzer for Hydro Power applications


Particle size analyzer for Hydro Power applications

The LISST-Hydro instrument system is designed to supplement Sequoia’s LISST-Infinite instrument in hydro power monitoring applications or work as a standalone instrument for hydro power plants where the sediment concentrations do not exceed 700-8,000 mg/l.

It incorporates a complete optics and electronics system for measurement of size distributions and concentrations. Water is delivered to the system from the river via a pump, or from the hydropower plant via a pipe or hose, e.g. from the draft tube. The LISST-HYDRO is designed to operate with line power. A SCADA data display on a dedicated monitoring computer in the powerhouse is available. With the LISST-HYDRO, Sequoia offers economical turnkey solutions for hydro power monitoring applications.


  • Designed for autonomous use
  • Operates from 110/220VAC, 50Hz line power
  • Self contained system transmits data to monitoring PC (not included) over RS-485.
  • LISST-Infinite Master Controller and LISST-Infinite Monitor software included
  • Submersible well pump for sample intake acquisition (optional)
  • Built in clean water source level monitoring
  • Automatic background blanking for improved long term performance
  • Warnings for high sediment concentrations on dedicated monitoring PC (not included)
  • Built-in automatic ultrasonic cleaning

LISST-Hydro brochure


Sediment concentrations

  • 10-8,000 mg/l @ < 1 mg/l resolution. NOTE: Actual range is dependent on the grain-size and size distribution of the suspended particles. See table below for details and examples of concentration ranges based on measurements using ISO particle standards and easily obtained reference materials. SMD: Sauter Mean Diameter).
  • 1.9 to 387 um particle size range (for natural random particles) in 32 size classes
  • Accuracy as per USGS acceptance criteria

Measured Parameters

  • Detailed particle size distribution
  • Detailed volume concentration
  • Optical transmission

Mechanical and Electrical

  • Dimensions: 18.5″ x 14″ x 7.5″ [H x W x D]
  • Weight: 12 kg
  • Mounting: Wall mounting only
  • Water pressure: 5 psi or less
  • 4-20 mA or MODBUS output available upon request