Reactor online viscometerIt is an intelligent sensing device used for real-time, continuous, and non sampling monitoring of the viscosity of materials in reaction vessels during production processes such as chemical, pharmaceutical, food, and polymer materials. Compared with traditional offline sampling and testing methods, online viscometers can accurately grasp the rheological changes of materials in key reaction stages such as polymerization, condensation, emulsification, and crystallization without interrupting the process flow, providing key data support for process control, endpoint judgment, and product quality consistency.

This device usually adopts the principles of rotary (such as shaft cylinder, cone plate or paddle), vibration (such as tuning fork or torsional vibration) or ultrasonic measurement, where rotary is suitable for medium high viscosity systems, and vibration is more suitable for clean or low to medium viscosity media. The probe is directly inserted or flange installed on the side wall or bottom of the reaction vessel, which can withstand high temperature, high pressure, strong corrosion, and high shear conditions. The material is mostly 316L stainless steel, Hastelloy alloy, or PTFE lining to ensure long-term stable operation. The built-in high-precision temperature sensor can synchronously compensate for the influence of temperature on viscosity, improving measurement accuracy.

　　Reactor online viscometerScope of application:

1、 Polymer and Synthetic Materials Industry

Polyester production (PET, PBT, PTT)

Real time monitoring of melt viscosity during the condensation stage, precise control of intrinsic viscosity (IV value) and molecular weight distribution.

Polyurethane (PU)

Track the reaction process of isocyanate and polyol, prevent the gel point from getting out of control, and optimize the foaming or pouring time.

Epoxy resin and unsaturated polyester resin

Monitor the viscosity rise curve at the initial stage of curing, and judge the pot life and gel time.

Acrylic resin, styrene polymerization (such as ABS, PMMA)

Control the "Trommsdorff effect" in bulk or solution polymerization to avoid explosive polymerization.

2、 Manufacturing of new energy materials

Preparation of electrode slurry for lithium batteries

Real time monitoring of the viscosity of the positive electrode (NCM/LFP) and negative electrode (graphite/silicon carbon) slurries to ensure that the solid content and dispersion uniformity meet the requirements of the coating process.

Avoid uneven coating thickness, tape breakage, or drying defects caused by viscosity fluctuations.

Adhesive dissolution process (such as PVDF, CMC/SBR)

Determine the endpoint of polymer swelling and dissolution, and improve batch consistency.

3、 Fine Chemicals and Pharmaceuticals

Synthesis of high viscosity intermediates

Such as multi functional group condensation and condensed ring compound reaction, to prevent local overheating or stirring failure.

Crystallization or precipitation reaction

Abnormal increase in viscosity can warn of the risk of solid precipitation, agglomeration, or blockage.

Catalytic hydrogenation, oxidation and other exothermic reactions

Combining temperature and viscosity data to achieve safety interlock and reaction rate regulation.

Aseptic raw material synthesis (compliant with GMP/PAT)

Support 'Quality by Design' (QbD) to reduce the risk of contamination caused by offline sampling.

4、 Coatings, inks, and adhesives industry

Polymerization process of water-based/oil-based coatings: control the balance between particle size and viscosity of lotion.

UV cured resin synthesis: Monitor the viscosity of the prepolymer to ensure subsequent dilution and coating performance.

Structural adhesives and sealants (such as silicone and polysulfide): track the rheological behavior during the initial crosslinking stage, optimize packaging and construction windows.

5、 Food and daily chemical products

Emulsification system (salad dressing, face cream, shampoo)

Real time monitoring of emulsion stability and consistency formation to ensure consistent product texture.

Starch gelatinization, pectin gel, chocolate tempering

By determining the endpoint of the process through the viscosity inflection point, the taste or formability can be improved.

Yeast fermentation broth, protein drinks

Monitor viscosity changes during biological reactions and evaluate cell density or product accumulation.

6、 Petrochemical and Lubricant Industry

Modification of heavy oil, residual oil, and asphalt: monitoring the rheological properties under high temperature shear.

Synthesis of lubricant additives (such as viscosity index improvers): controlling polymerization degree and thickening effect.

7、 Scientific research and pilot scale up

Used in laboratory reactors or pilot plants for:

Study on Reaction Dynamics

Optimization of process parameters (temperature, feeding rate, catalyst dosage)

Amplification effect verification (from laboratory to industrialization)