Unique real-time sampling architecture for synchronous sourcing and measuring

  • MeasureSync™ technology for simultaneous source module update and measure module sampling timing across all channels
  • DC/AC amplitude and phase detection is user-selectable on all measure channels
  • Common DAC/ADC sampling clock ensures highly precise and consistent source/measure timing coordination between 3 sources and 3 measures

Designed for scientific-grade low-level measurement applications 

  • 100% linear module power supply architecture for lowest possible source/measure noise
  • Fully linear signal path between data converters, modules, and the device under test (DUT)
  • Remote modules for the shortest possible signal path to the DUT, which separates sensitive analog circuits from digital circuits and unwanted sources of interference typical of traditional single-enclosure instrument designs

The absolute precision of DC plus the detection sensitivity performance of AC instrumentation

  • All source and measure channels are capable of DC and AC to 100 kHz signals
  • Optimized for fundamental, harmonic, and phase AC plus DC biased measurements
  • Modularity allows for flexible, user-configured modules to suit a specific application

Unique, flexible instrument/distributed module architecture

  • Remote-mountable amplifier modules are interchangeable between instruments
  • Modules are dynamically recognized when the system is reconfigured
  • Uses a clean, simple UI and a common programming API for fast setup and a shorter learning curve


A new approach to Hall measurement

The MeasureReady® M91 is a revolutionary, all‑in-one Hall analysis instrument that delivers significantly higher levels of precision, speed, and convenience to researchers involved in the study of electronic materials.

Featuring Lake Shore’s patented* new FastHall measurement technique, the M91 fundamentally changes the way the Hall effect is measured by eliminating the need to switch the polarity of the applied magnetic field during the measurement. This breakthrough results in faster and more precise measurements, especially when using high-field superconducting magnets or when measuring very low-mobility materials.

You can also harness the power of FastHall along with a Quantum Design PPMS — check out our M91 FastHall™ analysis kit for PPMS®

*Protected by US patent number 9797965. Other patents pending.


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Simpler and more convenient

  • All-in-one instrument
  • Automatically selects optimal excitation and measurement levels
  • Automatically executes measurement steps
  • Provides complete Hall analysis
  • Easy to use, easy to integrate with existing lab systems
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Makes better measurements, faster

  • No need to reverse the magnetic field with FastHall
  • Up to 100× faster for low-mobility materials
  • Improves accuracy by minimizing thermal drift
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  • Build a new Hall system or upgrade an existing one
  • Add state-of-the-art Hall measurement capability to any lab
  • Use with any type of magnet

Watch the demo video:

Watch a demonstration video of our M91 FastHall measurement controller

Guarded insert for PPMS features

  • Fastest measurement with reduced settling time
  • Best performance for low-noise, low-current measurement
  • Fully guarded from instrument to sample when used with the M91 FastHall™ controller


MeasureReady® low-noise DC and AC/DC 155 voltage and current source features

  • Low RMS noise: from 200 nV (10 mV)/7 pA (1 µA)
  • Bipolar, 4-quadrant power source
  • DC and AC modes supported up to 100 kHz*
  • Full-scale ranges—voltage: 10 mV to 100 V, current: 1 µA to 100 mA
  • 0.001% programming resolution (from 100 nV/10 pA)
  • In-phase reference output for use with a lock-in amplifier (155-AC only)
  • Manual and autorange function
  • Front and rear input connectors
  • Touchscreen user interface
  • USB and LAN connectivity (GPIB option)
  • 3-year standard warranty

*MeasureReady 155-AC