Premier™ ESR

Encapsulated Sample Rheometer

The Premier™ ESR is designed for the composite, thermoset, and thermoplastic industries. The ESR can characterize resins and composite materials in a single test, measuring dynamic mechanical properties before, during, and after cure.


  • Measure prepreg viscosity, gel point, cure, and final modulus in a single test without removing resin from fiber
  • Optimize curing conditions for consistent product quality
  • Improve incoming raw material quality
  • Check quality of shelf-aged materials
  • Test under isothermal conditions, temperature ramp & hold, or mimic the cure in an oven or autoclave
  • Rapidly evaluate materials from new sources
  • Reduce waste, improve efficiency, and reduce cost
  • Includes pressure transducer for pressure measurement
  • Operates using Enterprise software, a flexible LIMS system based on an open SQL database platform


  • Heating Rate: 0.36 °F/min. (0.20 °C/min.) to 90 °F/min. (50 °C/min.)
  • Max Cooling Rate: 54 °F/min. (30 °C/min.)
  • Measurements: Torque (S’, S”, S*), Tan(Delta), Dynamic Viscosity (η’, η”, η*), Shear Modulus (G’, G”, G*), Temperature (°C or °F), Strain (degrees, %, fractional strain), Frequency (cpm, Hz, radians/sec), Pressure (kPa, psi)
  • Electrical: 100/110/120/130 VAC ±10%, 60 ±3 Hz, 20 amp single phase, 200/220/240/260 VAC ±10%, 50 ±3 Hz, 10 amp single phase
  • Dimensions: W: 22 in (56 cm), H: 48 in (122 cm), D: 25 in (64 cm)
  • Weight: Net 346 lb (157 kg), gross 616 lb (280 kg)