The new Discovery Series Hybrid Rheometer (DHR) represents the latest technological breakthroughs from the world leader in rheology. It combines a patented advanced drag cup motor, a second generation magnetic bearing, force rebalance transducer (FRT), and the new patent-pending True Position Sensor (TPS) in a single-head Hybrid rheometer. The DHR has unprecedented performance specification and delivers unsurpassed direct strain control, direct stress control, and normal force measurement accuracy. The DHR features all popular TA innovations including patented Smart SwapTM geometries and the widest range of Smart Swap temperature systems and accessories commercially available. The result is the most advanced, versatile rheometer platform imaginable.
The HR-3 is the pinnacle of the Discovery Hybrid Rheometer family. Featuring the world’s best available torque sensitivity and the all new patent-pending Optical Encoder Dual Reader, the HR-3 is the most advanced single-head rheometer in the world.
|Bearing Type, Thrust||Magnetic|
|Bearing Type, Radial||Porous Carbon|
|Motor Design||Drag Cup|
|Minimum Torque (nN.m) Oscillation||0.5|
|Minimum Torque (nN.m) Steady Shear||5|
|Maximum Torque (mN.m)||200|
|Torque Resolution (nN.m)||0.05|
|Minimum Frequency (Hz)||1.E-07|
|Maximum Frequency (Hz)||100|
|Minimum Angular Velocity  (rad/s)||0|
|Maximum Angular Velocity (rad/s)||300|
|Displacement Transducer||Optical encoder|
|Optical Encoder Dual Reader||Standard|
|Displacement Resolution (nrad)||2|
|Step Time, Strain  (ms)||15|
|Step Time, Rate  (ms)||5|
|Normal/Axial Force Transducer||FRT|
|Maximum Normal Force (N)||50|
|Normal Force Sensitivity (N)||0.005|
|Normal Force Resolution (mN)||0.5|
Zero in controlled stress mode. Controlled rate mode depends on duration of point being measured and sampling time.
 Results at 99% of commanded value
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Optical Encoder Dual Reader
This patent pending technology provides unimaginable resolution of better than 2 nanoradians while enhancing phase resolution and eliminating drift. (Model HR-3 only)
Second Generation Magnetic Thrust Bearing
Patented design with improved low torque performance and mapping stability. With less than 70% of the friction of air-bearings, it can measure down to 0.5 nNm of torque. Inherently more robust and not susceptible to contamination compared to air-bearings. Patent # 7,137, 290 & 7,017,393
Advanced Drag Cup Motor
The DHR incorporates our redesigned & patented drag cup motor, with digital current control for more stable torque output and minimal drift. The DHR motor provides extremely smooth acceleration, the fastest step strain and step rate response, and keeps inertia, temperature, and friction to an absolute minimum. Patent # 6,798,099
Normal Force Rebalance Transducer
The DHR combines popular force rebalance transducer, or FRT, technology with the world’s most advanced single-head Rheometer for zero compliance highly accurate normal force measurements up to 50N.
New True Position Sensor (TPS)
Patent-pending technology provides true gap accuracy via a high resolution linear position sensor that makes real-time gap corrections for movement due to thermal expansion. Works with all smart SWAP™ geometries and environmental systems.
Active Temperature Control (ATC)
Patented technology enables wireless temperature measurements across an air gap in non-contact systems. With ATC, the actual upper plate temperature is known rather than inferred, making real-time control of both plates possible. The benefits are faster temperature response, true temperature ramp capability, and elimination of complex calibration procedures and offset tables. Patent # 6,931,915
- Color Display
- Smart SWAP geometries
- Smart SWAP™ temperature systems and options
- Intuitive Touch Keypad
- Single-Piece Casting and Liner Slide
Displays a variety of information to the test station to facilitate sample loading and viewing of real-time information during experiments.
Smart SWAP™ geometries
Features patented Smart Swap™ geometries. When attached, the information is automatically read and the software is configured with appropriate parameters (type, dimension, material).
Patent # 6,952,950
Intuitive Touch Keypad
A robust, intuitive keypad inspires simple interaction by placing the most important rheometer functions at your fingertips. Available functions include: gap zero, trim gap, go to gap, raise and lower head, start and stop tests. The keypad employs a rugged, sealed design that resists even the most aggressive solvents, providing worry-free operation in any environment.
Single-Piece Casting and Liner Slide
New single-piece aluminum casting and rugged linear ball slide configuration reduces torsional and axial compliance by 60% over traditional designs. A micro stepper motor and linear optical encoder ensure precision positioning of the geometry with a resolution of 0.02 microns. The open design provides ease of access and ample space for sample loading and trimming.
Advanced Peltier Plate
Environmental Test Chamber
Electrically Heated Plates
UV LED Curing
Small Angle Light Scattering
Dual Peltier Plate
Upper Heated Plate (UHP)
World’s Most Versatile Platform for Rheological Measurements
All DHR temperature systems and accessories are designed with superior performance and ease-of-use in mind. Only TA Instruments’ DHR offers the convenience and versatility of Smart Swap™ geometries, temperature systems, and accessories. Smart Swap™ technologies provide fast and easy interchanging of accessories and automatic detection and configuration of the rheometer for operation.
Why is it called a Hybrid Rheometer?
We’ve taken powerful technology from the ARES-G2 and combined it with the core of our best selling AR products. Add in patented and patent-pending new technologies and TA has created the world’s most powerful and versatile rheometer platform.
Who should buy and who will benefit?
In a word everyone! New users will obtain a powerful platform that’s easy to use. User’s of competitive equipment will enjoy a more reliable and versatile platform, capable of performing a wider range of experiments on their samples. Existing TA users will appreciate the enhanced performance specifications, new features, powerful new TRIOS software, and a seamless transition to the new technology..
What's new with the Discovery Hybrid Rheometer?
The DHR rheometers represent the latest technical breakthroughs from TA Instruments, they include:
- Second generation magnetic bearing with 0.5 nN.m torque
- Force rebalance transducer technology for Normal Force Measurements
- Patent pending optical encoder dual-reader technology with unprecedented resolution to two nanoradians.
- Redesigned and patented new motor with non-contact temperature sensor, and active cooling for the most accurate torque control and measurements.
- Patent pending True Position Sensor (TPS) for real-time gap corrections
- Color display and capacitive touch keypad for easy instrument interaction
- New TRIOS Software
What are the main differences between AR-Series Rheometers and the new DHR?
The DHR rheometers replace all current AR Series models. All three rheometers include magnetic bearing technology, True position Sensor (TPS), Smart Swap temperature systems, Smart Swap geometries, active temperature control (ATC), FRT normal force control, and TRIOS software.
Can I use my existing geometries on a new DHR?
All Smart Swap™ geometries, previously available on the AR-G2 only, are compatible with new DHR rheometers.
Can I use my existing AR-Series Smart Swap environment system or accessories on the DHR?
All Smart Swap™ temperature systems and options are compatible with the new DHR rheometer with the exception of two. The Environmental Test Chamber (ETC) and Electrically Heated Plate (EHP) have been redesigned to accommodate the new ultra-low compliance frame design. However, ETC and EHP manifolds and Smart Swap™ geometries are compatible with the DHR.
Can I read my Rheology Advantage files in TRIOS software?
Yes. AR Series experimental files can be opened in the new TRIOS software to allow for data viewing and analysis.
How much should I budget for the DHR rheometer?
Despite all of the new features and patented new technology, DHR systems are priced about the same as our previous generation AR products. There are three different models available (HR-1, HR-2, HR-3), for expert assistance configuring a system that fits your laboratory’s needs; contact your local Sales Representative.
- 3 New Accessories for the DHR
- 5 Reasons to Upgrade to a Discovery Hybrid Rheometer
- See Smart Swap in Action
- Advanced Peltier Plate for the DHR
- DHR Brochure
- DHR Accessories Brochure
- Discovery Hybrid Rheometer
- Webinar: Interfacial Rheology -G. Fuller
- Webinar: Analyzing Polymer Molecular Weight Distribution and Blend Morphology Using Rheology – C. Macosko