Solution Science for Research and Industry

Posts tagged “capacitor

From near absolute to over one thousand degrees – Lake Shore have a sensor to suit

With the UK’s record breaking hot weather continuing, we thought you might like to know that Lake Shore Cryotronics offer four types of sensor for temperature measurement:

Diodes
A diode temperature sensor is the general name for a class of semiconductor temperature sensors. They are based on the temperature dependence of the forward voltage drop across a p-n junction. The voltage change with temperature depends on the material. The most common is Silicon, but Gallium Arsenide (GaAs) and Gallium Aluminium Arsenide (GaAlAs) are also used.

Resistors
These sensors are based on the change of resistance with temperature, and can be classified as positive temperature coefficient (PTC) or negative temperature coefficient (NTC). Platinum RTDs are the best example of PTC resistance sensors.

Capacitors
Capacitors are also used for low temperatures, but usually not for temperature measurement. Capacitance temperature sensors have the advantage of being insensitive to magnetic fields, but they commonly experience calibration shifts after thermal cycling.

Thermocouples
Thermocouples are only useful where differential temperature measurements or low mass are the main consideration. They must be calibrated in-situ as the entire length of the wire contributes to the output voltage if it traverses a temperature gradient.

Each type sensor has its own particular advantages in terms of temperature range and response, as well as design features and drawbacks, so Elliot Scientific recommends contacting us to discuss your application and its requirements.

Lake Shore also do some nice instruments to go with their sensors!

 

 

 

 

 


The “World’s Most Accurate” Capacitance Bridges are from Andeen-Hagerling

Andeen-Hagerling AH2700A Capacitance Bridge Test Instrument

Andeen-Hagerling manufacture the world’s most accurate capacitance bridges and standards, and their AH 2700 models offer unparalleled stability, resolution, linearity and accuracy in a multi-frequency capacitance/loss bridges.
Andeen-Hagerling AH2700A Capacitance Bridge Test Instrument
The numerous state-of-the-art features of the AH2700 make it an exceptionally user-friendly instrument, with unmatched precision that enables it to open up new applications in calibration, manufacturing and scientific research.

The AH2700 is the culmination of over 40 years of Andeen-Hagerling experience in bridge design and manufacture. The unique ratio transformer and the temperature-controlled, fused-silica capacitance standard make the instrument a true bridge for measuring highly accurate capacitance/loss figures which are independent of the exact test frequency (50 Hz – 20 kHz) and immune to mechanical shock.

Applications

  • Dielectric Characterisation
  • Carbon Nanotubes, Nanowires and Quantum Dots
  • Dilatometry: Thermal Expansion, Magnetostriction
  • Ferroelectrics
  • Biophysics
  • Liquid Crystals
  • Low Temperature Physics
  • Magnetocapacitance, Magnetoresistance and Magnetodielectric effects
  • Magnetometry
  • Pressure/Capacitive Bolometry
  • Scanning Capacitance Microscopy (SCM)
  • Spectroscopy
  • Single Electron Tunneling (SET)
  • Structure And Phase Transitions
  • Superconductivity
  • Superfluids
  • Tunneling
  • Atomic Layer Deposition (ALD)
  • Nano-Force Metrology
  • Precision Positioning
  • Scanning Tunneling Microscopy (STM)
  • Glasses
  • Gravity
  • Semiconductor Test
  • Electrical/Capacitance Metrology

For more information on this and the other Andeen-Hagerling instruments we offer, please contact us.


“The world’s most accurate capacitance bridge” just got better

Andeen-Hagerling AH2700A Capacitance Bridge Test Instrument

Andeen-Hagerling manufacture the world’s most accurate capacitance bridges and standards, and their forthcoming AH 2700A-E now offers substantially improved resolution over the entire operating range as well as the usual unparalleled stability, resolution, linearity and accuracy you would expect in a multi-frequency capacitance/loss bridge from the company.
Andeen-Hagerling AH2700A Capacitance Bridge Test Instrument
The numerous state-of-the-art features of the AH2700A-E make it a very user-friendly instrument, with a super-sensitivity that enables it to explore, with a new precision, applications in calibration, scientific research, and manufacturing.

The AH2700A-E is the pinnacle of decades of Andeen-Hagerling experience in bridge design and manufacture, and is complemented by its sister model, the AH2700A-E-C that offers continuous frequency scanning. Both models will be shipping in 2013, but we would recommend you express your interest now as there will be a waiting list for these exceptional instruments.

For more information on this and the other Andeen-Hagerling instruments we offer, please contact us.


May 2012 Newsletter Now Online

April 2012 E-LetterThe Elliot Scientific May newsletter is now available as a PDF. In this issue we report on new lasers from FEMTOLASERS including the latest CEP4 oscillator, new collimators from Micro Laser Systems, new micropositioners from mechOnics, and Andeen-Hagerling’s capacitance bridge equipment.

To read it online magazine-style click here.

To download it in your browser as a PDF, click here.


Andeen-Hagerling offer “The world’s most accurate capacitance bridge”

Andeen-Hagerling AH2700A Capacitance Bridge Test Instrument

Andeen-Hagerling manufacture the world’s most accurate capacitance bridges and standards and their AH 2700A model offers unparalleled stability, resolution, linearity and accuracy in a multi-frequency capacitance/loss bridge.
Andeen-Hagerling AH2700A Capacitance Bridge Test Instrument
The numerous state-of-the-art features of the AH2700A make it an exceptionally user-friendly instrument, with unmatched precision that enables it to open up new applications in calibration, manufacturing and scientific research.

The AH2700A is the culmination of over 40 years of Andeen-Hagerling experience in bridge design and manufacture. The unique ratio transformer and the temperature-controlled, fused-silica capacitance standard make the instrument a true bridge for measuring highly accurate capacitance/loss figures which are independent of the exact test frequency (50 Hz – 20 kHz) and immune to mechanical shock.

For more information on this and the other Andeen-Hagerling instruments we offer, please contact us.