M6550 HPHT Spinning Drop Tensiometer

  • Height: 20 in.
  • Width: 15 in.
  • Depth: 19 in.
  • Weight: 40 lbs.
  • Max Temperature: 350 °F
  • Max Pressure: 1,000 psi

HP/HT Interfacial Tension Measurement
The Grace Instrument M6550 HPHT Spinning Drop Tensiometer measures low interfacial tension at elevated temperatures and pressures, set by the operator. The unit features a microscope that magnifies up to 25x with a numerical display resolution of 0.0001 mm, offering researchers the greatest measurement accuracy of any comparable device on the market today

High-resolution microscope for enhanced accuracy
The Grace Instrument M6550 HPHT Spinning Drop Tensiometer was developed for the measurement of interfacial tension, surface tension, absorption rate and extreme low interfacial tension. Excellent temperature control and optimum synchronization of the instrument allows the sample to be observed over a long period of time under constant conditions.

Light-weight and easy to handle
The M6550 is lightweight at only 40 lbs. and includes a level adjustment control with handles on its two sides. This allows the user to easily pick up, travel with, and/or manipulate the unit in order to reposition the test droplet quickly and efficiently.

20" height x 15" width x 19" depth
40 lbs.
Pressure Range:
Atmospheric to 1,000 psi
Temperature Range:
Ambient (45°F with chiller) to 350 °F
Speed Range:
0 to 11,000 rpm continuous
Surface Tension Measurement
10-6 to 10^2 mN/m
Capillary diameter:
2.0 mm
Microscope magnification:
LCD Numerical Display Resolution:
0.0001 mm
120V or 240 V (with transformer)
Digital Camera Imaging System:
(Requires Microsoft Windows XP or later OS for operation)
Live Resolution:
2.0 MP
Optical Format:
Focusable Lens:
16 mm
  • Measurement of extremely low interfacial surface tension
  • Accurate RTD temperature readout
  • Advanced PID temperature controller
  • Accurate speed controller ensures high image synchronization
  • High accuracy of reading with stroboscope illumination
  • LCD numerical display for integrated microscope
  • Light weight
  • Adjustable leveling
  • Optional chiller sleeve for low temperature applications
  • Optional digital camera imaging system (includes third-party PC software for data measurement and image processing)
Downloads for the M6550 HPHT Spinning Drop Tensiometer:

Read more about our instrument's technical applications within these scientific and academic publications:

  1. Optimal Salinity Study to Support Surfactant Imbibition into the Bakken Shale
    Study of dilute surfactant formulations and optimal salinities of Bakken formation waters and oils, in order to examine the potential to imbibe into and displace oil from the formation. IFT measurements between oil and surfactant were conducted at temperatures of 30, 60, 90 °C by means of a M6550 HPHT Spinning drop tensiometer.
    SPE 167142
  2. Impact of Surfactants for Wettability Alteration in Stimulation Fluids and the Potential for Surfactant EOR in Unconventional Liquid Reservoirs
    Evaluation and comparison of anionic and nonionic surfactants effect on wettability and interfacial tension alteration in carbonate and siliceous preserved side-wall shale cores. M6550 was used to measure low IFT values (less than 2mN/m) between oil drop and frac fluid.
    SPE 169001
  3. Interfacial Rheology of Heavy Oil-Aqueous Systems at Elevated Temperatures and Pressures: Effect of Diluents
    The effect of diluents on interfacial rheology of a heavy oil and synthetic brine when subjected to high pressure high temperature as well as room temperature and atmospheric pressure conditions. M6550 was used to measure IFT values between diluted oil and synthetic brine.
    SPE 170128
  4. Effect of Surfactant Polymer Interaction on the Interfacial Properties for Chemical EOR
    Investigation of surfactant polymer systems and the interfacial tensions occurring between the various formulations and a Saudi Arabian crude oil at temperatures between 30° and 90° C by a means of M6550 HPHT Spinning drop tensiometer.
    SPE 172706