PRODUCTS

Immersion viscometer bath

Dynamic viscosity measurement for laboratory and industrial applications

Dynamic viscosity measurement is essential for evaluating how liquids and semi-solid materials resist flow under applied force. Accurate viscosity data supports product development, quality control and process optimisation across a wide range of industries.

Fungilab provides complete dynamic viscosity measurement solutions based on precision rotational viscometers, temperature control systems and specialized accessories designed to deliver reliable, repeatable and traceable laboratory results.

Whether measuring low-viscosity liquids or highly viscous materials, Fungilab offers instruments adapted to routine laboratory testing as well as demanding research applications.

Our accessories

Enhance the capabilities of your Fungilab viscometer with accessories designed for more accurate, versatile and efficient viscosity measurements.

Heating circulator

Immersion thermostat with digital control THERMOVISC 150

ADJUSTABLE TEMPERATURE FROM AMBIENT +5°C TO 150°C.

FEATURES

• LCD Screen
• Rear connection for additional PT100 probe. Automatic selection.
• Working volume depending of selected tank (12L or 20L)**
• Maximum working volume to maintain maximum temperature: 20 litres.
• Tank made of AISI 304 stainless steel.
• A clamp and finger screw attach the unit to the tank, alternatively the
extendible support bridge accessory can be used.
• Minimum fixing depth to the tank: 14 cm.
• Cooling coil included.

**NOTE: Available in 2 models: 12L tank REF: B150B12SE or 20L tank REF: B150B20SE. Ask for more technical details to our general email admin@fgb-company.com.

Immersion thermostat with digital control THERMOVISC 200

ADJUSTABLE TEMPERATURE FROM AMBIENT +5°C TO 200°C.

With external refrigeration from -20 to 200ºC.

FEATURES

• TFT Screen
• RS-232, USB and Ethernet output.
• Working volume depending of selected tank (12L or 20L)**
• Maximum working volume to maintain maximum temperature: 20 litres.
• Tank made of AISI 304 stainless steel.
• A clamp and finger screw attach the unit to the tank, alternatively the
extendible support bridge accessory can be used.
• Minimum fixing depth to the tank: 14 cm.
• Cooling coil included.

**NOTE: Available in 2 models: 12L tank REF: B200B12SE or 20L tank REF: B200B20SE. Ask for more technical details to our general email admin@fgb-company.com.

Our viscometers

LABORATORY DIVISION

Dynamic viscosity

Viscosity is part of the science of Rheology which quantifies the resistance materials give to changing shape.

Proper interpretation of viscosity data can reduce the rate of rejects while keeping production and formulation development costs to a minimum. Consistent product quality is ensured through proper viscosity measurements, either alone or in conjunction with compatible tests.

Dynamic viscosity testing can help with:

Material characterization or “finger-printing”
Standard testing methods to check for differences between batches
Indirect way of measuring quality
Product formulation
Quality control
Process control
Design, optimization and operation of process equipment

Material characterization or “finger-printing”

Standard testing methods to check for differences between batches

Indirect way of measuring quality

Product  formulation

Quality  control

Process  control

Design, optimization and operation of process equipment

Viscosity types

Dynamic viscosity

Poise
Centipoise (mPa*s)

Kinematic viscosity

Stokes
Centistokes (mm2/sec)

Apparent viscosity

Poise
Centipoise (mPa*s)

Newton’s Law

According to Newton’s law, the viscosity of a fluid is constant. As shear rate changes, shear stress changes in proportion such that viscosity is constant. Common fluids that exhibit such behavior are:

Unfortunately for us, not all fluids follow Newton’s law. In fact, most fluids do not. For this reason, fluids are classified into two categories:

Rotational Viscometer

The viscosity is calculated from the measured torque and rotational speed, as well as the dimensions of the measuring geometry.
A fluid’s resistance to flow is measured by the torque it exerts on the rotating shaft of the viscometer.

Absolute viscosity: the measuring geometry fulfills certain requirements (which is the case of coaxial spindles).‏

‏Relative viscosity: the dimensions of the measuring geometry are not well defined.

Advantage

Flexibility in:

Application

For Newtonian and non-Newtonian substances and temperatures different from room temperature.

Temperature-controlled immersion baths for viscosity testing

Immersion viscometer baths maintain a constant temperature around the measuring vessel, allowing viscosity tests to be performed under stable thermal conditions. Since even small temperature variations can significantly affect viscosity values, immersion baths are an essential component of accurate laboratory viscosity measurements.

They are commonly used with capillary viscometers, rotational viscometers and certified reference materials during calibration and verification procedures.

Applications of immersion viscometer baths

Immersion baths are suitable for:

Capillary viscosity measurements.
Rotational viscosity testing.
Calibration procedures.
Quality control laboratories.
Research and development.
Petroleum, chemical and pharmaceutical testing.

Compatible Fungilab equipment

Fungilab immersion temperature control systems are compatible with a wide range of viscosity measurement instruments, including rotational viscometers and capillary viscometers.

For capillary viscosity testing, the THERMOCAP precision bath provides exceptional temperature stability, making it ideal for laboratory measurements requiring high accuracy.

Heating and cooling solutions

Depending on the required operating temperature, Fungilab offers heating circulators and refrigerated circulators capable of maintaining precise thermal conditions across a broad temperature range.

Calibration and verification

For laboratories operating under quality management systems, immersion baths are frequently used together with certified viscosity standard oils to verify instrument performance and maintain measurement traceability.

Benefits of precise temperature control

Improved measurement accuracy.
Excellent temperature stability.
Higher repeatability between measurements.
Compliance with laboratory testing procedures.
Reliable viscosity determination for quality assurance.

Frequently asked questions about Immersion Viscometer Bath

What is an immersion viscometer bath?

An immersion viscometer bath is a temperature-controlled bath used to maintain stable thermal conditions during viscosity measurements.

Why is temperature control important during viscosity testing?

Viscosity changes with temperature, so precise thermal control is essential for obtaining accurate, repeatable and comparable measurement results.

Which instruments can be used with an immersion viscometer bath?

Immersion baths are commonly used with capillary viscometers, rotational viscometers and certified reference materials during calibration procedures.

What is THERMOCAP?

THERMOCAP is Fungilab's precision temperature-controlled bath specifically developed for highly accurate capillary viscosity measurements.

Can immersion baths both heat and cool samples?

Yes. Depending on the model, Fungilab offers heating and refrigerated circulators capable of maintaining stable temperatures across a wide operating range.

Which industries use immersion viscometer baths?

They are widely used in petroleum, chemical, pharmaceutical, food and research laboratories requiring accurate viscosity measurements.

Can immersion baths be used during instrument verification?

Yes. They are frequently used together with certified viscosity standard oils to verify instrument performance under controlled temperature conditions.

What are the main advantages of an immersion viscometer bath?

They provide excellent temperature stability, improved measurement accuracy, better repeatability and reliable laboratory viscosity testing.