M3400 Dial-Reading Viscometer


  • Height: 16.5 in.
  • Width: 5 in.
  • Depth: 8 in.
  • Weight: 10 lbs (Standard)
  • Automatic Preprogrammed Testing: 10-minute and 10-second gel strength testing.
  • Shear Rate: 0.17 - 1020 sec-1 (With Standard R1B1 Geometries)
  • Viscosity: 0.5 - 10,000,000 cP

Innovative Design with Dial-Reading Settings
The M3400 is a 9-speed Couette coaxial cylinder rotational viscometer and incorporates years of customer feedback into its design. The M3400 features a steel framework and robust electronics and 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 tests. The innovative design and rugged construction of the M3400 Viscometer makes it versatile and portable--whether operation is in the field or in the laboratory.

Hassle-free Speed Change
Currently, industry standard viscometers shift through different rotational speeds with a control knob that requires some finesse to operate. The M3400 takes all of that hassle away with a control pad, allowing any speed at any time.

One-Touch Button Initiates 10-Second and 10-Minute Gel Tests
The M3400 comes preprogrammed with popular test sequences: 10-second gel strength and 10-minute gel strength. With the touch of a button, the manual shifting of speeds in these processes are eliminated, resulting in more repeatable test results. At the end of a gel test, the M3400 will beep to notify the user.

Operating Temperature: Ambient
Sample Size: 35-220 mL (Depending on bob size, cup, and sleeve type.)
Testing Sample Temperature Range: 32°F to 200°F (With Optional Heater Cup)
Pressure Range: Atmospheric
Viscosity Range: 0.5 to 10,000,000 cP
Shear Stress Range: 1.02 to 61,200 dyne/cm2 (Up to 3,500 dyne/cm2 with standard R1B1 bob configuration. Up to 61,200 dyne/cm2 with other optional bob options.)
Resolution: 1 dyne/cm2 to 10 dyne/cm2 (Based on spring selection. Standard spring is 5 dyne/cm2 .2 spring is 1 dyne/cm2.)
Available Springs: F0.2, F0.5, F1, F2, and/or F5
Speed Range: 600, 300, 200, 100, 60, 30, 6, 3, 0.1 rpm
Shear Rate Range: 0.17 - 1020 sec-1 (With Standard R1B1 Geometries)
Accuracy: ±0.5% of Torque Span
Voltage: 100-240V AC
Frequency: 50-60 Hz
Wattage: 40 W
Standards: API 10 & API 13 Compliant
Sounds: Auto Beep for 10 Sec Gel and 10 Min Gel
Manufactured Location: USA
Dimensions: 16.5" H x 5" W x 8" D
Weight: 10 lbs. (Standard)
  • The unit features a control pad, dial reading, and can shift speeds with one button press.
  • Able to perform automatic 10-minute or 10-second gel strength measurement of drilling muds, oil well cements, and fracturing fluids with alarm sound.
  • Includes B1 bob, R1 rotor sleeve, and F1 torsion spring.
  • Complies with API 10 and 13 standards.
  • The unit is dual voltage.
The M3400 Viscometer standard equipment includes:
  • Cover
  • Lens Cover
  • Stainless-Steel Sample Cup
  • R1 Rotor Sleeve
  • B1 Bob
  • F1 Torsion Spring
  • Dust Shield/Anti-Climber
  • Operation Manual with Grace Instrument Warranty

Optional equipment includes:
  • B2 Bob
  • B5 Bob
  • Closed-End Sleeve (For Smaller Sample Volumes)
  • Carrying Case
  • Heater Cup (Choose Between 120 or 240V AC)
  • 100 cP Calibration Fluid
  • Calibration Tool
Downloads for the M3400 Viscometer: