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Home  >>  Products  >>  Surface Tension  >>  Sensadyne Surface Tensiometers
Sensadyne Surface Tensiometers

Models QC3000 & QC6000

SensaDyne Tensiometers are the only commercially available instruments that replicate ASTM test method D 3825-90 Standard Test Method "Dynamic Surface Tension by the Fast-Bubble Technique"

QC6000
QC6000

SensaDyne instruments can continuously monitor surface tension within fluid sample streams, using a flow-through cell arrangement. The measurement is taken within the body of the fluid and is unaffected by any surface contaminants.

SensaDyne Tensiometers use a patented technology that is a refinement of the Maximum Bubble Pressure Method. Click Here for Information on Accuracy, Stability, and Software for SensaDyne Tensiometers




FEATURES METHOD MORE INFO PRICE LIST
 

 

Features

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  • Includes a new Windows 7 Computer equipped with Windows 7 Software, Sensadyne Software, Interface Board and Interface Software
  • Measure Both Dynamic and Static (Equilibrium) Surface Tension
  • Allow Accurate, Continuous Real-Time Measurements
  • Interface with Standard IBM & Compatible Computers
  • Provide Computerized Data Collection& Graphing
  • Operates with External Regulated Air, Nitrogen, or Inert Process Gas Supply
  • Very Simple Operation, Windows® based Software Program
  • Simple Menu-Driven Calibration Program

 

Bubble Pressure Method

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The maximum bubble pressure method avoids error-causing effects by measuring surface tension within the body of the fluid. It is the "Simplest Accurate Method" for measuring surface tension.

Two glass probes having orifices of different diameters are positioned below the surface of the liquid. A pressurized process gas source forms bubbles in the liquid, and the differential pressure of the bubbles is measured and equated to the surface tension of the measured liquid. Unlike other maximum bubble pressure methods, the SensaDyne's patented double probe method allows complete independence of immersion depth, for accurate repeatable results.

The Tensiometer's pneumatic system provides constant volumetric gas flow, making the flow independent of down-stream pressure. Flow rate to each orifice is adjustable through external valves. This allows interface formation time (bubble rate) selection from up to forty or more bubbles per second to one bubble every two minutes. Bubble rate, surface age, fluid temperature and fluid surface tension are displayed on the computer's video terminal.

Bubble Pressure Method

 

Temperature

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The surface tension of a liquid generally increases as the temperature decreases, and vice versa. In the SensaDyne, a temperature probe is immersed in the fluid at orifice level to always provide a temperature reading with a resolution of 0.1 degrees C.

 

Serves the Following Industries

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  • Inks
  • Paints
  • Chemicals
  • Semiconductor/Plating baths
  • Adhesives
  • Printing
  • Oil
  • Coatings
  • Detergents
  • Aerosols

 

Computer Interface and Operation

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SensaDyne Tensiometers interface to a personal computer using a plug-in computer interface board. The software program allows display, storage and collection of data, redisplay of stored files, and graphing of surface tension related data.

The unit functions as a computerized sensor with the ability to store real-time surface tension values, and provide visual displays of the monitored parameters. Each time a bubble is generated at the orifice, the SensaDyne makes a discrete surface tension measurement. This is output as a moving average surface tension value. If the process changes, the tensiometer readings will track the change. The instrument can be used for simple, quality control measurements or integrated into the most complex closed-loop process control system. Click Here for more information on software.

 

Calibration

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The SensaDyne does not require a skilled, experienced technician for operation. Calibration is entirely a function of two known standard fluids and the surface tension values of each. The computer program calculates and stores the required calibration curve. Each step of the calibration procedure is displayed and operator-prompted on the computer terminal in a step-by-step sequence.

 

Models

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  Model QC3000
Model QC3000
 
Model QC3000
  • Adjustable bubble Rate:
    • Max: 25 Bubbles/Second
    • Min: 1 Bubble Every 120 Seconds
  • Compact Sensor Package
  • Compact Probe Assembly Stand with 5" (12.7 cm)
  • Vertical Adjustment and Built-In Laboratory Jack
  • Standard Non-Breakable Stainless Steel Probes
  • Accuracy within ±0.15 Dynes/Cm
  • Optional Vernier Handle Micrometering Valve

 
  QC6000
ModelQC6000
Model QC6000
  • Adjustable bubble Rate:
    • Max: 40 Bubbles/Second
    • Min: 1 Bubble Every 120 Seconds
  • Diffusion Rate Studies with Software
  • Automatic Surface Age (Surfactant Diffusion) Determination
  • Software Peak Detection Accuracy within ±0.1 Dynes/Cm
The QC6000 is SensaDyne's mid-range instrument which adds independent bubble rate mass flow controllers, to the basic features of the QC3000, allowing a wider monitoring range with increased precision and accuracy. It's compact design combines simple operation with fast and accurate results. It can generate data for characterizing surfactant formulations for Research and Development, or it can be easily modified for use in an on-line environment with a variety of configurations. Automatic and accurate measurement of surfactant diffusion rates (Surface Age) is included, along with our latest Windows software, and Automatic Calibration (AutoCal) feature.

 

Prices

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Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices

Includes a new Windows 7 Computer equipped with Windows 7 Software, Sensadyne Software, Interface Board and Interface Software
FT-6012 Model QC3000 Low Cost Surface Tension Monitor $8,500.00
FT-6026 Model QC6000 Mid Range Surface Tension Monitor 10,500.00
Click Here for Information on Accuracy, Stability, and Software for SensaDyne Tensiometers



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