Strain Controlled Rheometer ( ARES G2)

Rheometer modes :    Rotational and Oscillation mode rheometer with the Separate Motor & Transducer technology and High resolution optical encoder

Motor  :Brushless DC

Maximum Motor Torque  Greater than 750 mNm

Bearing :         Air bearing

Minimum transducer torque in oscillation:     less than  0.075 µNm

Minimum transducer torque in steady shear : less than 0.25 µ Nm

Maximum transducer torque : 200 mNm or better

Torque Resolution :    1nN.m or better

Strain Resolution :      0.05 µrad or better

Minimum angular displacement in Oscillation            :  1µrad

Step change in shear rate :       5 ms

Step change in strain  :10 ms

Normal/Axial Force range :     0.001 to 20N or better

Angular Velocity Range:  1 x 10-6 rad/s to 300 rad/s or better

Shear rate range:        Up to 5000 s-1 or above

Angular Frequency Range :    Up to 628 rad/s

Temperature range :   -150°C to 600°C

Accessories available with this machine

1. Orthogonal superposition (OSP)  
2. Linear Dynamic Mechanical Analysis (DMA)
3. Interfacial accessories      
4. High Temperature Accessories.

Multi Drive Rheometer (MCR 702)

Rheometer Measuring Heads: 1. Single rotational / oscillatory motor for

                                                   combined motor transducer mode

                                                 2 .Dual rotational / oscillatory motor for separate motor

                                                     transducer mode and counter movement mode

Dmta Measuring Head Type:   linear motor with magnetic suspension and/or air bearing 

Force / Torque Range : 0.005 N to 25N    For linear motor

                                      0.5nNm to 230m for rotational / oscillatory motors

Force / Torque Resolution: 0.0005 N for linear motor

                                            0.1nNm for rotational / oscillatory motors

Actuator / Motor Bearing:       air bearings on all motors

Frequency Range:       10E-6 to 600 rad/s

Temperature range :   -160°C to 600°C

Linear Motor Displacement Range:     0.5 micron to 5000 micron

Strain Sensors: Optical encoder (linear and rotational/oscillatory)

Linear Motor Displacement Resolution:          5 nm

Modes:   Strain And Stress Control

Measurement Types  : Oscillatory, Rotational, Extension, Torsional & Transient  

Oscillatory Modes:     Strain Controlled & Stress Controlled.

Accessories available with this machine

1. High Temperature Accessories.
2. Linear Dynamic Mechanical Analysis (DMA)
3. TwinDriveRheo-Microscopy
4. RHEO-SALS
5. UV Curing Cell
6. RHEO-PIV
7. RHEO-DRD (Di-Electro Rheology Device)
8. RHEO-MRD (Magneto Rheology Device)
9. RHEO-ERD (Electro Rheology Device)
10. POWDER RHEOLOGY CELL
11. HIGH PRESSURE CELL
12. INTERFACIAL RHEOLOGY CELL
13. IMMOBILIZATION CELL

ARES-G2

TheARES-G2provides independent measurements of stress and strain. The ARES-G2 is the only Separate Motor and Transducer (SMT) rheometer in the world. An SMT is more than two drives. It is a separate motor and transducer optimized for every aspect of rheological measurement. A motor designed for perfect deformation. A transducer optimized for exacting stress measurements. The result is the purest rheological measurements, free of instrument artefacts over the widest ranges of stress, strain and frequency.

The ARES-G2 Torque Rebalance Transducer (TRT) is the third  generation  of  rebalance  transducers  designed  and  optimized  exclusively  for  the  most  exacting  measurements  of  sample  stress.

The ARES-G2 incorporates patented non-contact temperature sensor technology for active measurement and control of both the upper and lower plate temperature.

MCR 702

MCR 702 MultiDrive as a CMT (Combined Motor Transducer) rheometer with a single EC motor . Performing ‘classic’ stress-controlled tests. Signal from encoder and torque from upper motor to calculate rheological properties. Connection of all temperature devices and application-specific accessories of the MCR rheometer series possible. Compliance calibration is done as part of calibration. Temperature control of air bearing responsible for long-lasting torque and normal force accuracy.

Both motor units are employed in a synchronized fashion. One motor (upper) is brought to a fixed position and operated solely as a torque transducer. Offer Zero Compliance. One motor (lower) operates as a drive unit. Speed or angle from bottom motor and torque from upper motor are used to calculated rheological properties. Software displays the physical properties of both motors.

Rheology is the study of flow and deformation of materials. Deformation and flow are referred to as strain or strain rate, respectively, and indicate the distance over which a body moves under the influence of an external force, or stress. For this reason, rheology is also considered to be the study of stress-strain relationships in materials. A  rheometer  is  a  precision  instrument  that  contains  the  material  of  interest  in  a  geometric  configuration, controls the environment around it, and applies and measures wide ranges of stress, strain, and strain rate.Material responses to stress and strain vary from purely viscous to purely elastic to a combination of  viscous  and  elastic  behaviour,  known  as  viscoelasticity.  These  behaviours  are  quantified  in  material properties such as modulus, viscosity, and elasticity.

1) Shinde, Sachin Balasaheb, and Lalit Kumar, "New Method for Gelation Temperature Measurement without Disturbing the Crystal Network." Industrial & Engineering Chemistry Research 60, no. 23 (2021): 8565-8578.

2) George E, Jahan I, Barai A, Ganesan V, Sen S,.”High ligand density drives extensive spreading and motility on soft GelMA gels.” Biomed Mater. 2021 Aug 13;16(5)

3) Ankita Jain, Jyoti R. Seth, Vinay A. Juvekar, Nidhi Verma and Nandini Pandey, “Remarkable decrease in the viscosity of waxy crude oil under an electric field,” Soft Matter, 2020,16, 10657-10666

Details of published paper for F. Y. 2022-2023:

1. Samim Ali, Anju Tiwari, Thean Yeoh, Pankaj Doshi, Narayani Kelkar, Jaymin C. Shah and Jyoti R. Seth (2022), Crystallization and Rheology of Mono- and Diglycerides and Their Role in Stabilization of Emulsion Droplets in Model Topical Ointments, Langmuir, 38, 28, 8502–8512
2. Mithun Madhusudanan, Jotypriya Sarkar, Sudeshna Dhar and Mithun Chowdhury (2023), Tuning the Plasticization to Decouple the Effect of Molecular Recoiling Stress from Modulus and Viscosity in Dewetting Thin Polystyrene Films, Macromolecules, 56, 4, 1402–1409
3. Jijo Easo George, Riddha Manna, Shomdutta Roy, Savita Kumari, Debjani Paul (2023), Pump-free and high-throughput generation of monodisperse hydrogel beads by microfluidic step emulsification for dLAMP-on-a-chip, Biorxiv,
4. Namrata Singh, Komal Patel, Ambuja Navalkar, Pradeep Kadu, Debalina Datta, Debdeep Chatterjee, Semanti Mukherjee, Ranjit Shaw, Nitisha Gahlot, Abhishek Shaw, Sachin Jadhav, Samir K Maji, (2023), Amyloid fibril-based thixotropic hydrogels for modeling of tumor spheroids in vitro, Biomaterials, 295, 122032-122049

• Fluid type (suspension, emulsions, polymer solution, electrorheological fluid, magnetorheological fluid, etc..), if there are particles then their size and material, if is it volatile, MSDS of sample
• Type of measurement (shear sweep, SAOS, electrorheology, interfacial rheology, etc,)
• Required volume of sample is depends on the type of analysis and test. 

We shall accept online registration only through the IRCC webpage. If you need to cancel your slot, send an email immediately to with an explanation.

• Slots will be provided on a first-come-first-served basis.
• USB drives are strictly prohibited for copying data to minimize virus-related issues. You are requested to bring a new blank CD to transfer your data. All data must be transferred within 7 days of imaging. Without exception.
• Users must be present during the entire slot.

• Only online registration through the IRCC webpage will be accepted
• If the appointment is given but the user cannot come, a mail should be immediately sent to  [at] iitb [dot] ac [dot] in to cancel his/her slot.
• Bring a new blank CD for copying the images. The USB drives are not allowed due to computer virus problems.