M3600 Automatic Viscometer


  • Height: 16.8 in.
  • Width: 5 in.
  • Depth: 8 in.
  • Weight: 12 lbs
  • US Patent: 6,571,609

Two Operational Modes - Stand-alone or Integrated with PC
The M3600 Viscometer can be used as a stand-alone unit, enabling users to create test sequences and record test data without the use of external equipment. It can also be connected to a Microsoft Windows PC operating our custom software for advanced test operations, test results analysis, and to export test data in spreadsheet format.

Durable, Reliable, and Affordable Digital Power
The innovative design and rugged construction of the M3600 Viscometer make it equally at home in the field or in the laboratory.

Software to cover all tests, from general viscosity to specialty
The included M3600Frac software is designed for measuring fracturing fluids, while M3600DAQ is designed for general viscosity measurement and mud testing. The Grace Instrument M3600 Viscometer is a true Couette, coaxial cylinder, rotational viscometer. It is engineered to meet the various fluid rheology measuring needs of our customers, from on-site oilfield personnel doing single-speed tests in harsh environments to laboratory researchers doing advanced rheology testing.

The M3600 Viscometer incorporates a steel framework, robust electronics and user-friendly interface for years of trouble-free operation and minimal maintenance. Clean-up between tests is easy and quick, and calibration is automatically performed with the push of a button. Used as a stand-alone unit, or with a Microsoft Windows PC and the included M3600DAQ and M3600Frac software, the M3600 Viscometer provides versatile and affordable solutions to meet your viscometer needs.

US Patents: 6,571,609
Dimensions: 16" height x 5" width x 8" depth
Weight: 12.5 lbs. (standard) or 14 lbs. (acid option)
Temperature Range: Ambient (20°F with chiller) to 212°F
Pressure: Atmospheric Pressure
Sample size: 35 - 190 mL (depending on bob size & cup sleeve type)
Resolution: 1 dyne/cm2
Speed Range: 0.01 to 600 rpm continuous
Shear Rate Range: 0.0038 to 1020 sec-1
Shear Stress Range: 2 to 3,600 dyne/cm2
Viscosity Range: 0.5 to 27,000,000 Centipoise
Torque: 7 μN.m to 14 mN.m
Accuracy: ± 0.5% of torque span or better
Viscometer Voltage: 90 VAC to 240 VAC
Heater Cup Voltage: 120 VAC version and 240 VAC version
Computer Requirements: PC with MS Windows 9X/2000/XP/Vista/Win 7
  • Sturdy, portable, and compact
  • Automatic and fully digital
  • Includes LCD display with automated keypad control
  • Allows test flexibility
  • Stores test data
  • Low maintenance with repeatable results
  • Available with an acid-proof option, which allows the user to test samples with high acid concentrations, including fluids with 30% HCl.
  • All wetted materials are Hastelloy C276 construction.
  • Carrying Case contains the M3600 Viscometer with attached rotor, data cable, three bobs, anti-climber, thermocouple and heater cup.
Read more about our instrument's technical applications within these scientific and academic publications:

  1. Minimizing Environment and Economic Risks With a Proppant-Sized Solid-Scale-Inhibitor Additive in the Bakken Formation
    Development of a new solid-scale inhibitor additive, which is also proppant-sized, in order to minimize environmental hazards in hydraulic fracturing jobs.
    http://dx.doi.org/10.2118/159701-MS
    SPE 159701 (M3500)

  2. Evaluation of Micronized Ilmenite as a Weighting Material in Oil-based Drilling Fluids for HPHT Applications
    Analysis of oil-based drilling muds containing ilmenite as a weighting material based off laboratory studies of the rheological properties at high temperatures as well as filtration characteristics. M3600 was used to measure rheologies of drilling fluids.
    http://dx.doi.org/10.2118/165184-MS
    SPE 165184

  3. Comprehensive Assessment of Additive and Class G Cement Properties Affecting Rheology, Fluid Loss, Setting Time and Long Term Characteristics of Elastic Cements
    Experimental assessment of non-foamed cement slurries in order to obtain rheological and mechanical properties subjected to both room and high pressure and temperature systems.
    http://dx.doi.org/10.2118/167731-MS
    SPE 167731 (M3500 Viscometer)

  4. Field Monitoring of Weight-Material Sag
    Laboratory study of drilling fluids as to measure sag-related properties and introduction of new testing techniques that will manage weight-material sag in field operations.
    www.aade.org/app/download/6834686104/AADE-10-DF-HO-25.pdf
    AADE-10-DF-HO-25 (M3500)

  5. Rheological properties of palygorskite-bentonite and sepiolite-bentonite mixed clay suspensions
    Investigation into the rheological properties of mixed bentonite-palygorskite suspensions and the influences of layer charge and smectite content on the rheological data.
    http://www.sciencedirect.com/science/article/pii/S0169131713004286
    Applied Clay Science 90 (2014) 165-174 (M3500)

  6. Gelation of water-bentonite suspensions at high temperatures and rheological control with lignite addition
    Experimental study of the effectiveness of lignite addition to bentonite drilling fluids as to control gelation and identify ideal rheological control agents.
    http://www.sciencedirect.com/sciencei/article/pii/S0169131706001827
    Applied Clay Science 36 (2007) 221-223 (M3500)

  7. A Novel Viscosity Reduction Plant-Based Diluent for Heavy and Extra-Heavy Oil
    Experimental study of viscosity reducing solvent (toluene and xylene) on two different heavy oil samples of the Mexican heavy crude oil at different solvent concentrations (5, 15, 20, 25, and 30 wt%) and at temperatures varying from 75°F to 190°F.
    http://dx.doi.org/10.2118/179523-MS
    SPE-179523-MS (2016)

  8. Nanoparticle-Based Drilling Fluids for Minimizing Formation Damage in HP/HT Applications
    Investigation of nanopartical additives' influence on rheological behavior of drilling fluids at various temperatures (120-200°F). Newtonian shear rates were determined from measurements that were obtained at fixed rotational speeds.
    http://dx.doi.org/10.2118/178949-MS
    SPE-178949-MS

  9. Application of a Novel Cement Spacer with Biodegradable Polymer to Improve Zonal Isolation in HTHP Wells
    Investigation of rheological properties of cement spacer system at room temperature immediately after mixing. Measurements were acquired at various rotational speeds from 3 to 300 rpm.
    www.aade.org/app/download/6834686104/AADE-10-DF-HO-25.pdf
    OTC-27048-MS

  10. Development and Testing of Novel Drilling Fluids Using Fe2O3 and SiO2 Nanoparticles for Enhanced Drilling Operations
    Rheological properties of various water-based drilling fluids containing iron oxide and silica nanoparticles were investigated. The rheological parameter estimation was done according to the Herschel-Bulkley model.
    http://dx.doi.org/10.2523/IPTC-18381-MS
    IPTC-18381-MS

  11. Removal of Ilmenite Oil-based Filter Cake under HP/HT Conditions Using Hydrochloric Acid
    Drilling fluid rheological properties were measured according to the API 13B standard protocol and were conducted at 120°F.
    http://dx.doi.org/10.2118/175728-MS
    SPE-175728-MS