W2 MKII Sedimentation Studies Apparatus


W2 MKII Sedimentation Studies Apparatus

The Armfield Sedimentation Studies Apparatus provides a facility for studying the basic physical processes involved in sedimentation.


Sedimentation is a process used widely in the clarification of water and waste water. Particles settle from suspension in different ways, depending on the concentration of the suspension and the characteristics of the particles.

The simplest type of sedimentation is the settling of a dilute suspension of particles that have little or no tendency to flocculate. In these circumstances, the prediction of clarification rates and their scaleup to plant design is relatively straightforward.

For higher concentrations where inter-particle effects become significant and where agglomeration may take place, different regimes of settling rate occur, known as ‘zone’ settling (fig 1).

Information from batch tests for such systems forms a vital part of the search for the optimum design and operation of industrial sedimentation tanks.

fig2 Sedimentation curves from sample data

Armfield W2MkII Sedimentation studies apparatus.


Technical Specifications

Tube length: 1m
Tube internal diameter: 51mm
Number of tubes: 5

Features & Benefits

  • Low-voltage operation via universal power supply for improved safety
  • LED backboard illumination
  • Pycnometer


Optional accessories

Triple beam balance with 0.1g sensitivity (ordering code: INST 059)

Electrical supply: supplied with a universal mains adapter suitable for 100-240V / 1ph / 50-60Hz

Water: Initial fill of 1.5L per tube

CaC03 or Chalk (not supplied)

Packed and crated shipping specifications

Volume: 0.8m³

Gross weight: 90Kg

Length: 0.70m
Width: 0.45m
Height: 1.30m


INST 059 (optional)