Brookfield AMETEK

AST-100 Advanced Sensor Technology

for direct in-line viscosity measurement

Product Description

AST-100® Viscometer

The AST-100 is the world's most innovative means of viscosity control. The AST-100 is a versatile instrument that is excellent for customers who are looking for viscosity control (i.e. maintaining the viscosity of the product) in their process more than the measurement of an exact number (ex. 23.5cP). It is easy to install, cleans-in-place, and has no moving parts, so maintenance is minimal. With available options it is suitable for explosion-proof applications or 3A food-grade applications as well.

Features And Benefits

  • No moving parts to wear, bind or contact process materials
  • Simple Clean-In-Place design
  • Rugged 316 SS construction
  • Continuous, reliable 4-20 mA output
  • Saves you money while increasing your production
  • Easy installation
  • Digital display


Viscosity Range: 2 - 12500 (cP or equivalent cup-seconds)
Temperature Range: -20°C to +200°C
Repeatability/Stability: ±1% of the Reading
Outputs: 4 - 20 mA
Connections: 1″ NPT inlet/outlet


The new AST-300SY Single Station Viscosity Controller and AST-400SY Multi-Station Viscosity Controller are designed for use with Brookfield AST-100 Systems to accurately measure and control viscosity.

  • Precise, programmable, on/off dosing control
  • Intuitive screen layout
  • Quick selection of setup and menu items
  • At-a-glance set point and alarm status
  • Displays viscosity in cP, mPas, cSt or cup-seconds, current pH value a temperature in C or F
  • Viscosity and pH data trending
  • pH and pump interlock
  • Multi-level password protection
  • Viscosity high/low alarms

AST-300SY Single Station Controller

The AST-300SY Single Station Controller is designed for use with the Brookfield AST-100TSY as part of the viscosity control system to measure viscosity and temperature, interlock with other process devices, and accurately control the viscosity of your product in a variety of industrial applications.

AST-400SY Multi-Station Controller

The AST-400SY Multi-Station Controller is designed for use with up to ten Brookfield AST-100TSY viscosity control units as part of a multi-product viscosity control system. The system will measure viscosity and temperature, interlock with other process devices, and accurately control the viscosity of your products in a variety of industrial applications.


Explosion Proof
  • Explosion-proof with FM and Atex approval
  • Sanitary with APV housing and 3A approval
  • pH control for printing applications.
Flange Mount

Flange mount designs are available to allow for direct mounting onto a process tank through a sidewall flange.

Probe Style

Probe Style mount designs allow for insertions into tanks from above.


Low Viscosity
Adhesives, solvent based Chemicals
Coatings Inks, water based
Oils Paints and Latex

Medium Viscosity
Adhesives, hot melt Food Products
Inks, screen printing Paper Coatings and Pulp