Electromagnetic Rotation Viscometer (EMS-1000S)

Electromagnetic Spinning Viscometer (EMS-1000S)

The EMS viscometer employs a new viscosity measurement principle. The sample is placed into a sample container, a sphere is inserted into the container, and then the container is placed into the EMS viscometer.
The measurement by the electromagnetic spinning sphere viscometer involves observing the viscosity of a liquid through the rotation of a sphere driven by electromagnetic interaction. Two magnets are attached to the rotor to create a rotating magnetic field. The sample is placed in a measurement tube, which contains a sphere. The tube is housed in a temperature-controlled chamber, with the sphere positioned at the center between the two magnets. The rotating magnetic field induces eddy currents in the sphere. The resulting Lorentz force generates torque between the magnetic field and the eddy currents, causing the sphere to rotate. The rotational speed of the sphere depends on the rotational speed and strength of the magnetic field, as well as the viscosity of the sample surrounding the sphere. The motion of the sphere is monitored by a video camera.

Main Features of the Electromagnetic Spinning Viscometer (EMS-1000S):

1. Wide temperature range: 0～200°C, ±0.1°C, within 10 minutes (25°C→200°C).
2. Broad measurement range: 0.1～100,000 mPa·s (when using a Φ2mm sphere).
3. Fast measurement speed: approximately 1 second for viscosities below 100 mPa·s, about 1 minute for 10,000 mPa·s.
4. Flow property evaluation: shear rate range of 0.01～150 s⁻¹, flow curve evaluation via rotational speed.
5. Minimal sample volume: standard 300 μL, with an optional 90 μL sample container for viscosity testing.
6. Excellent sealing: sealed tube prevents sample evaporation and errors. Sample can be recovered and reused.
7. Very easy operation: place the sample and sphere into the tube, then insert the tube into the instrument for testing.
8. No cleaning or maintenance required: uses inexpensive, disposable sample tubes and spheres, eliminating post-test cleaning.

Technical Specifications of the Electromagnetic Spinning Viscometer (EMS-1000S):

Instrument Name: EMS Electromagnetic Spinning Viscometer.
Model: EMS-1000S.
Viscosity Measurement Range:
0.1～1,000 mPa·s (Φ1.5mm sphere, optional).
0.1～100,000 mPa·s (Φ2mm sphere).
10～1,000,000 mPa·s (Φ4.7mm sphere).
100～100,000 mPa·s (Φ5mm titanium sphere, optional).
Measurement Repeatability: RSD within 3% (based on KEM standard measurement conditions).
Sample Volume:
90 μL (small volume container + Φ2mm sphere, optional).
300 μL (Φ2mm sphere).
700 μL (Φ4.7mm sphere).
700 μL (Φ5mm titanium sphere, optional).
Temperature Setting Range: 0～200°C (when setting measurement temperature ≤10°C, ambient temperature should not exceed 20°C).
Temperature Stability: ±0.1°C.
Rotational Speed Setting Range: 500～1000 rpm.
Rotational Speed Stability: ±3%.
Operating Environment Temperature: 10～30°C.
Operating Environment Humidity: Below 85% RH (no condensation).
Storage Temperature Conditions: -20～60°C.
Storage Humidity Conditions: Below 85% RH (no condensation).
Main Unit Power Supply: AC200～240V±10% or AC100～120V±10%.
Main Unit Power Consumption: Approximately 150 W.
Main Unit Dimensions: 374(W) x 347(D) x 335(H) mm.
Main Unit Weight: Approximately 24 kg.