Adsem's unique Si cryogenic NTC thermistors for low and ultra-low temperatures were featured in Winter 2010 issue (Volume 26, Number 1, page 28) of "Cold Facts" , the Cryogenic Society of America magazine

New Si cryogenic sensors from AdSem

AdSem, Inc. (http://www.adsem.com  ), a manufacturer of unique semiconductor temperature sensors for high-, low- and ultra-low temperatures (500°C - 1 mK), announces extension of its Si cryogenic NTC thermistor family. Using special doping AdSem has developed high performance Si NTC thermistors for temperature ranges of 300K - 77K, 300K - 0.3K and 4.2K - 1mK. These Si thermistors have increased thermosensitivity, decreased sensitivity to magnetic field at helium temperatures, higher thermoconductivity (this is a specially important at ultra-low temperatures T<<1K) and almost two orders of magnitude higher radiation hardness in comparison with germanium thermistors. Such thermistors are important for temperature measurements in presence of nuclear radiation, for example, in neutron "cold" sources, polarizing filters, accelerators with superconducting magnets, for measurements in space, including nuclear calorimeters/X-ray detectors (instead of thin ion-implanted Si thermistors), etc. AdSem offers these Si cryogenic thermistors with leads or as dies with surface area down to 100x100µm² and almost any thickness. The standard size Si thermistors are available immediately.

High Quality Catheter NTC Thermistors (http://temperatures.com  )

AdSem, Inc., the owner of the unique Si and Ge NTC thermistor technology announced beginning of industrial production of the special medical NTC thermistors.

A small size of the sensitive elements (down to 0.25 x 0.25 mm² in crossection) with 2 meter long leads makes them attractive for applications where sensor needs to travel a long distance through a narrow openings to the test site in high humidity/water environment, like human body. Both Si and Ge NTC catheter thermistors, developed by AdSem, are chemically stable in water (opposite to the ceramic thermistors) and have significantly higher thermosensitivity (-5.0 %/degree for Ge and –7.3%/degree for Si at room temperature) than ceramic thermistors or any other temperature measuring devices. AdSem’s  NTC thermistors are intended for highly reliable and accurate temperature measurements inside human body with the fastest response for a small temperature change.  Si and Ge catheter thermistors are produced both for wide temperature range applications in range of  –70^oC  - +80^oC and also for narrow temperature range (a few degrees or even a few tenth of degree). The catheter thermistors are available immediately for temperature sensor users.  (TempSensors' article here )

AdSem, Inc. reached new milestone in Cryogenic Thermometry (http://temperatures.com)

AdSem, Inc. - A semiconductor thermistor manufacturer with unique high and cryogenic temperature Si and Ge NTC thermistor products announced the development of ultra-low temperature Ge thermistors with operating temperature reaching microKelvin range. The calibration of AdSem’s Ge thermistor down to 900 μK (0.9 mK) was accomplished by Professor Douglas Osheroff’s group at Stanford University.

The development of Ge thermistors as a secondary thermometer in the microKelvin range is a crucial step for a significant increase in sensitivity of the fundamental rare nuclear events experiments, such as neutrinoless double beta decay and dark matter search. The thermistors are available for sale from AdSem.  (TempSensors' article here )

Adsem's WORLD's SMALLEST Ge NTC Thermistors in another Frost & Sullivan report "Advanced in HVAC&R Technologies".

AdSem, Inc. extends operating temperature for its new family of super-wide Si thermistors down to 1K. Thus, AdSem offers super-wide Si thermistors with operating temperature range of 730K - 1K. ( TempSensors' article here  )

AdSem, Inc.  announces about development of novel high sensitive  Si NTC thermistors  with unique super-wide operating temperature range of 30K - 730K.  This device has higher thermo sensitivity in operating temperature range and smaller size than platinum RTD.

AdSem has been recognized by Frost & Sullivan in its Sensor Technology Alert as manufacturer of the WORLD's SMALLEST GERMANIUM NTC THERMISTOR and owner of unique NTC thermistor technology.

AdSem presented Ge & Si Mosaic Monochromators for X-Rays at the Stanford SRL Users' Meeting.

AdSem has been recognized with the wide editorial coverage in the Sensor Business Digest as the inventor and developer of the revolutionary thermistor technology.

At MD&M West'04 Show AdSem introduced new inventions and products with high temperature thermistors:

• The smallest 150-micron Ge thermistors for Medicine.  A number of companies from Israel, Japan, and United States expressed interest in utilizing these thermistors for cardiac vascular applications.
• Microelectronic packaged surface-mount Ge and Si thermistors.
• Solid state fast response probes with internal Si thermistors.
• Solid state probes with one or several surface-mount micropackaged Ge or Si thermistors for measurements of temperature distribution.
• Flexible thermistor probes with one or several micropackaged Ge or Si thermistors for measurements of temperature distribution.

Sensors' Business Sense included AdSem into it's December's list of important happenings among the vendors and associations serving sensor based engineering.

"High-Temperature NTC Thermistors from AdSem" - Editorial coverage in Sensors Express, the bi-weekly e-newsletter from Sensors magazine.

Launch of AdSem on the recent Sensors Expo Fall was mentioned in the October 2003 Industry News

AdSem introduced the first Si & Ge high temperature NTC and novel cryogenic thermistors at SensorsExpo 2003 in Anaheim, California.