QTI news

NASA Releases New QPLD for the S-311-P-18 Series

BOISE, ID, October 8, 2015 -  The NASA Qualified Parts List Directory (QPLD) was updated in September 2015 to include several new QTI Sensing Solutions aerospace-qualified thermistors.  Four S-311-P-18/06 and /05 thermistors from QTI joined the company's previously approved parts on the QPLD.  QTI is currently on track for the addition of S-311-P-18/02 and /01 thermistors to the QPLD in the first half of 2016, with the /09 and /10 options in the second half of 2016. 

The latest QPLD can be found at
The updated S-311-P-18 spec can be found at
Learn more about QTI's S-311-P-18 thermistors.


NASA Releases New QPLD and S-311-P-18 Revisions

BOISE, ID, February 4, 2015 -  NASA’s new Qualified Parts List Directory (QPLD), published late in December 2014, includes several new QTI Sensing Solutions aerospace-qualified thermistors. Three S-311-P-18/08 thermistors from QTI join several QTI S-311-P-18/07 parts previously approved on the QPLD. The company is also on track for the addition of S-311-P-18/05 and /06 thermistors to the QPLD later this year. NASA also released a new revision to the S-311-P-18 specification around the same time as the new QPLD. The update was designed to clarify how calculations for Percent Defective Allowable (PDA) should be made. Throughout the update process, NASA and QTI collaborated on the changes needed. This recent S-311-P18 update was not the first time that NASA has partnered with QTI on a specification for aerospace-rated temperature sensors. QTI’s work with NASA on sensors for the Curiosity Mars rover resulted in the creation of the S-311-P-827 specification and QPLD for aerospace-rated surface mount NTC and PTC thermistors. The new QPLD can be found at The updated S-311-P-18 specification can be found at  Learn more about QTI Sensing Solutions' S-311-P-18 thermistors.


Staley Named President of QTI Sensing Solutions

BOISE, ID, February 3, 2015 -  QTI Sensing Solutions announced that John Staley has been named President of the company. Previously Staley held the position of Director of Business Development. “I am very excited to welcome John Staley to the role of President of QTI,” said Todd Ketlinski, QTI CEO. “John’s vision for QTI, his record of leadership, and focus on providing outstanding customer service make him a natural choice for this position.” Since joining QTI Sensing Solutions in 2008, Staley has been instrumental in orchestrating the company’s tremendous growth. As Director of Business Development, Staley focused on growing QTI’s commercial base, and was central to the development of several of QTI’s best-selling sensor lines. Staley said he is looking forward to strengthening QTI’s focus on excellent customer service. “My mantra is, ‘Make it easy to do business with QTI.’ I intend to continue to expand this culture throughout the company, while remaining true to QTI’s heritage of responsive customer service, outstanding engineering, North American manufacturing, and quality temperature sensors.”


QTI’s Sensors On Board Historic Orion Spaceflight

BOISE, ID, December 8, 2014 -  NASA’s Orion spacecraft successfully completed its first test flight on December 5, 2014. The four-hour flight saw the craft launch from Cape Canaveral, Florida, circle Earth twice reaching an altitude of over 3,600 miles from the planet, and return to Earth recovery and analysis. During re-entry the Orion Crew Module experienced temperatures of 4,000°F (2,200°C), and slowed from 20,000 miles per hour to about 20 miles per hour before splashing down in the Pacific Ocean. The test was a key part of evaluating four parts of the Orion vessel: the Launch Abort System, Crew Module, Service Module, and Multi-Purpose Crew Vehicle to Stage Adaptor. The unmanned flight gave NASA a critical opportunity to stress test Orion and gather flight data about the spacecraft and its electronic systems. The December 5 flight was also significant in that it marked the first human-rated spacecraft to go beyond Low Earth Orbit since the Apollo 17 mission. Throughout the Orion spacecraft and cabin were 1,200 sensors, recording data about the flight such as vibration, temperature, pressure, radiation, and acceleration. A number of those sensors were QTI’s aerospace-qualified S-311-P-827 thermistors. During the flight these sensors monitored temperature throughout Orion’s Crew Module, which will house and transport astronauts on future manned missions. QTI also supplied a number of aerospace-qualified platinum RTD-based probes as well as upscreened AVX capacitors for the Crew Module. Learn more about NASA's Orion program More information on QTI's aerospace-qualified thermistors


A55512B Mil-Spec Temperature Sensor "Resurrected" by QTI

BOISE, ID, October 13, 2014 -  Recently the Engineering Department at QTI Sensing Solutions was called upon to look into the feasibility of “resurrecting” a legacy Defense temperature sensor design. The A55512B mil-spec temperature sensor was one of the company’s original mil-spec probes. It was used for air temperature measurement in a wide variety of applications, before declining in popularity in favor of newer probe designs. QTI Engineering considered a number of factors, such as part reliability, materials, manufacturability, and appropriate cost of ownership, before determining that the A55512B sensor could be indeed be manufactured with current processes and materials at the same, or higher confidence level as done previously. QTI Engineering takes the quality of the temperature sensors it creates very seriously. QTI engineers look at all specifications with a critical eye, and often make recommendations to improve the part design. By improving on legacy designs, QTI has been able to utilize over 37 years of temperature sensing experience to bring a fresh perspective to many Defense projects. “QTI Sensing Solutions does everything in our power to support the end user’s needs, including supporting the Defense and Aerospace community in a consultative fashion,” said Jon Fishback, QTI Military and Aerospace Sales Manager. “Designing and manufacturing high-reliability, precision sensors is collaborative effort. It takes everyone’s input to come up with the best total solution.”


QTI Receives Commodity Classification Guidance on MIL-PRF Thermistors

BOISE, ID, September 15, 2014 -  QTI Sensing Solutions has received formal guidance from the US Department of Commerce, Bureau of Industry and Security (BIS) on commodity classification of its MIL-PRF defense rated thermistors. The guidance states that MIL-PRF-23648 and MIL-PRF-32192 thermistors classified “EAR99” are subject to the Export Administration Regulations (EAR) but are not listed on the Commerce Control List (CCL) or US Munitions List (USML).

This EAR99 ruling is important because QTI and its customers can now have a high level of confidence that defense rated thermistors can be shipped to almost anywhere in the world without a BIS license, as long as the destination is not a “proscribed” person or destination. (Current proscribed destinations are places such as Cuba, Iran, North Korea, etc.) If an export license were required, several weeks of lead time would be taken up with license applications, processing, and approval from BIS before the thermistors could be exported.

QTI’s Defense and Aerospace experts are constantly working to stay current on US Government regulations to ensure compliance for QTI and its customers. For additional information, please contact QTI’s Defense and Aerospace Department.

Click here for the full text of the guidance issued by the US Department of Commerce, Bureau of Industry and Security.


Starblazer Defense Communications Equipment Features QTI Thermistors

BOISE, ID, August 27, 2014 -  QTI Sensing Solutions has announced that several of its surface mount thermistors are being used in Raytheon’s Starblazer defense communications equipment.  The Starblazer radios feature defense-rated NTC and PTC surface mount thermistors.  Several of the thermistor styles have additional defense-rated screening for quality and durability.

Raytheon’s Starblazer communications equipment integrates multi-band, anti-jam, and data network-capable functionalities in to a single defense-spec package.  The equipment is designed for fixed and rotary wing aircraft.  For more on the Starblazer program, please visit Raytheon’s website.


QTI Sensing Solutions Returns to the Red Planet

BOISE, ID, August 8, 2014 -  QTI Sensing Solutions has announced that its thermistor temperature sensors have been selected to be part NASA’s 2016 InSight Mars lander mission.  This news comes two years after NASA’s Curiosity rover successfully landed on the Red Planet with QTI parts aboard.

The new InSight lander will be studying the inner structure of the core of Mars in order to learn how the rocky planets in our solar system were formed.  Mars is the ideal planet for this study, as it is large enough to have once had molten material, but lacks the plate tectonics found on Earth and the inhospitable climates of Mercury and Venus.

The InSight lander is being built by Lockheed Martin and is based on Lockheed’s successful 2007 Phoenix lander.  France’s space agency, Centre National d'Etudes Spatiales, is contributing a seismometer to the lander, and the German Aerospace Center, DLR, is contributing a heat-flow probe.  Construction and testing on the lander’s core structure has already begun ahead of its March 2016 launch date.

QTI’s contribution to the InSight Program are NTC surface mount thermistors designed, built and performance verified to ensure they will survive the harsh Martian environment.  The sensors will be used to help with temperature compensation on the lander’s drive motors.  NASA’s Jet Propulsion Laboratory determined that the drive motors needed some performance enhancement when operating at the extreme -143°C (-225°F) temperature InSight is expected to encounter on Mars.  QTI’s thermistors will help the drive motors operate at peak efficiency in the frigid temperatures.

“QTI is excited to once again be sending thermistors to the Red Planet,” said Jon Fishback, QTI Military and Aerospace Sales Manager.  “We are honored NASA/JPL-Caltech sought out QTI’s expertise and dedication to quality to help make another Mars mission a success.”

More information about the InSight Mars lander can be found on NASA/JPL-Caltech's website.


Skyfire Radios with QTI Thermistors Help US Army Modernize Communications

BOISE, ID, July 22, 2014 -  Raytheon has announced that it will be providing upgrades to radios found in the US Army’s helicopter fleet.  New Skyfire radios will be installed in Chinook, Blackhawk, and Apache Longbow helicopters.  The radios meet government data security and backwards compatibility requirements, and can interface with multiple flight management systems.  Two of the most significant upgrades the new Skyfire radios feature are their modern cryptography and increased bandwidth via use of an upgraded satellite communications network.

Each Skyfire radio features three QTI Sensing Solutions surface mount sensors: one QT0805 NTC thermistor and two QT0805 PTC thermistors, each with MIL PRF 23648 testing.  These precision defense-rated thermistors conform to EIA 0805 packaging.  In addition to MIL PRF 23648 screening, QTI’s test lab is qualified to perform testing specified in MIL PRF 32192, MIL STD 202, MIL STD 883, MIL PRF 38534 Class K and H Element Evaluation, and many other defense and aerospace specifications.


QTI Sensing Solutions Remains Focused on Sensor Quality and Responsive Customer Service

BOISE, ID, July 7, 2014 - The temperature sensor manufacturing industry in the USA has been in flux over the past few years.  Many companies, seeking to decrease costs, have moved their manufacturing to overseas facilities, resulting in decreased part quality and increased lead times.  Manufacturers have also shifted their focus to growing their business through acquisitions, leaving customers and their orders in limbo with unresponsive customer service.

Amid the chaos, QTI Sensing Solutions is quietly leading a revolution in temperature sensor manufacturing.  The company is setting itself apart with a customer-first attitude summed up in their motto, “Make it easy to do business with QTI.”  The company remains privately owned and is fueling growth by creating quality products and innovative stocking programs that solve customers’ problems.  QTI’s temperature probe manufacturing is done in one of its two plants in the USA.  By maintaining control of all aspects of manufacturing QTI has been able to ensure temperature sensor quality while keeping lead times short and prices competitive.  In addition to creating quality products, QTI is focused on providing knowledgeable and responsive customer service.  Engineering and Sales support is purposefully made easily accessible to customers.

This relentless focus on differentiation through customer service and quality products is creating growth for QTI Sensing Solutions.  All three of the company’s locations have added manufacturing personnel, lines, and equipment within the past several years to keep up with customer demand.  QTI is careful to remember its heritage of providing quality USA-made sensors and responsive customer service.  The company plans to continue doing things their way, solving customer problems and finding new ways to make doing business with QTI easy.


QTI Sensing Solutions' Temperature Sensors on Board During Record-Setting Flight

BOISE, ID, May 16, 2014 - QTI Sensing Solutions' sensors were part of a record-setting flight by Dassault Aviation's Falcon 7X aircraft.  The plane set a new trans-Atlantic speed record last month, flying from a New York City-area airport to London City.  The 3,465 nm (6,452 km) flight took five hours and 54 minutes, with the plane averaging a speed of Mach 0.88.

QTF/QT06007 PTC-based thermistors from QTI Sensing Solutions are part of the Falcon 7X's flight control boxes.  The temperature sensors play a critical role in monitoring the temperature of the boxes.


QTI Sensing Solutions' Acquisition of Redfish Sensors Merges Quality Manufacturing with Expanded Product Offering

BOISE, ID, April 28, 2014 - Today QTI Sensing Solutions announced that it has acquired Redfish Sensors, a distributor of sensor products.  Redfish Sensors, based in Meridian, Idaho, carries a broad catalog of sensing technologies and brings sourcing, distribution, and sales resources.  The company stocks a large selection of sensors from manufacturers all over the world, enabling customers to bypass the long lead times and high minimum order quantities often encountered when purchasing sensors directly from manufacturers.

“I am pleased to have Redfish Sensors as part of our team,” said Todd Ketlinski, CEO of QTI Sensing Solutions.  He went on to say, “By integrating the distribution and sales expertise of Redfish Sensors under the QTI umbrella, we will increase the efficiencies of both companies while continuing to offer the best products and services to our customers.”

QTI Sensing Solutions is a leader in U.S. temperature sensor and assembly manufacturing.  The 37-year-old company has its roots in manufacturing high-reliability temperature sensors for military and aerospace applications, and expanded into other markets several years ago.  QTI’s sensors can be found in a variety of places such as medical equipment, household appliances, and the Curiosity Mars rover.

As of May 1, 2014, Redfish will operate under the QTI Sensing Solutions name.  Redfish’s employees will be integrated into QTI’s Boise, Idaho location, performing roles similar to those they had at Redfish.

“Redfish Sensors has worked closely with QTI Sensing Solutions for a number of years, and we are excited to be able to offer QTI’s engineering and manufacturing expertise to our customers,” said Donna Lueder, General Manager at Redfish Sensors.  “The Redfish staff is committed to a smooth transition for our customers and will be continuing to provide quality customer support as part of QTI.”


DMSP Satellite Carries QTI Sensing Solutions Thermistors to Space

BOISE, ID, April 7, 2014 - QTI Sensing Solutions has announced that its aerospace-qualified thermistors are aboard a satellite successfully placed into orbit last week.  A Defense Meteorological Satellite Program (DMSP) satellite built by Lockheed Martin was launched April 3 from Vandenberg Air Force Base in California, atop an Atlas V rocket. Lockheed Martin confirmed signal acquisition from the satellite shortly after launch.  The satellite will support a number of U.S. military and civil weather programs that other weather satellite systems are not capable of supporting. 

In its suite of sensors the DMSP satellite carries several of QTI Sensing Solutions’ high reliability aerospace-qualified NTC thermistors.  QTI’s aerospace-qualified thermistors are commonly used for monitoring the temperature of a satellite’s solar arrays and electronics.

QTI Sensing Solutions is one of the leading U.S. suppliers of aerospace-qualified thermistors.  In addition to holding NASA S-311-P-18 and S-311-P-827 qualifications, the company is qualified to Defense specifications MIL PRF 23648 and MIL PRF 32192, and the European Space Agency’s ESA4006 specification.


QTIP68 Waterproof Sensors from QTI Receive NSF/ANSI 2 Certification

BOISE, ID, January 30, 2014 - QTI Sensing Solutions is pleased to announce that the company has received NSF/ANSI 2 certification for its QTIP68 series of waterproof temperature sensors.  The QTIP68 series joins two other QTI products with NSF certifications: the DTU6024C series of waterproof USB thermometers, and the QT06030 Series of waterproof temperature sensors.

The NSF/ANSI 2 certification is given by NSF International, an independent, accredited certification organization dedicated to ensuring that products meet public health and safety standards.  NSF/ANSI 2 certification is the standard for the safety of food processing and handling equipment.  In order to obtain this certification, extensive testing was performed on QTIP68 parts and QTI’s manufacturing plant in Nampa, Idaho was thoroughly audited. 

“With the NSF/ANSI 2 certification of these part series, QTI’s compliance with public safety standards has been reaffirmed,” said Dave Moe, QTI’s Director of Quality Assurance.  “Our customers, especially those who manufacture food processing and storage equipment, can be certain of our commitment to safe, quality products.”

To learn more about NSF International or view QTI’s certification, please visit NSF’s website at


QTI Sensing Solutions to Present Product, Hold Mixer at AHR 2014 Expo

BOISE, ID, January 7, 2014 - QTI Sensing Solutions has announced that it will be presenting one of its products during a New Product Technology Theater seminar at the 2014 AHR Expo, the largest and most comprehensive HVAC and Refrigeration exposition in the world.  QTI's General Manager, Brandon Coleman, will be presenting the free seminar.  Attendees will learn how legacy temperature sensors often fail in HVAC/R environments due to the temperature swings and moisture present.  To combat this problem, QTI has developed QTIP68 waterproof temperature sensors that withstand the demands of HVAC/R applications.  The presentation will be held on January 21 at 3:45 PM, in Technology Theater B.  Additional information can be found on the AHR Expo website.

QTI will also be hosting a mixer in their booth on Wednesday, January 22, from 2 PM to 6 PM.  AHR Expo attendees are invited to come by booth 8510 for a beer and discussion of the latest innovations in HVAC/R temperature sensing.


Keys to Reducing Temperature Sensor Failure Costs

BOISE, ID, October 8, 2013 - Over the 36 years that QTI Sensing Solutions has been making temperature sensors, we have helped numerous companies to reduce the headaches and extra cost caused by failed sensors. In an article for this month's Process Cooling Magazine we distilled our experience down to three tips to decrease temperature sensor failure costs. Although the magazine focuses on HVAC and Refrigeration, the tips are applicable to almost any industry.

Click here to read the article.


QTI’s Leaded Thermistors Approved for Spaceflight Applications

BOISE, ID, May 20, 2013 - QTI Sensing Solutions is pleased to announce the addition of several Qualified Products Listed (QPL) thermistors to NASA Goddard’s S-311-P-18 performance specification. The radial leaded S-311-P18 thermistors join QTI parts qualified to a wide variety of aerospace and defense specifications, including NASA’s S-311-P-827 surface mount thermistor specification; the Defense Logistics Agency’s MIL-PRF-23648 and MIL-PRF-32192 specifications, as well as thermistors approved on the European Space Agency’s Preferred Parts List.

“We are very excited to have NASA approve our leaded thermistors for the QPL,” said Jon Fishback, QTI’s Military and Aerospace Sales Manager. “QTI parts have long history of stable, dependable and accurate performance in demanding, mission-critical applications. QTI’s engineering team is always looking for new boundaries to push, and we are certain the first QPL S-311-P18 thermistors are the start of many more to be approved.”

QTI Sensing Solutions was founded in 1977 to meet the increasing demand for high quality electronic components for the aerospace industry. Since then the company has exceeded the requirements of some of the most stringent high reliability applications. 


Behind the Scenes at QTI's Nampa, Idaho Manufacturing Site

BOISE, ID, April 16, 2013 - The Business Insider publication profiles companies creating success despite a difficult economy. Recently the publication caught up with QTI for a tour of its Nampa, Idaho thermistor assembly facility. The decision to exclusively manufacture in North America has had a large impact on QTI Sensing Solutions and its customers by allowing more responsive customer communication, shorter part lead times, and most importantly, assuring quality products through increased production control.

Read the full Business Insider article here.


QTI Receives ITAR Registration

BOISE, ID, June 27, 2012 - QTI Sensing Solutions, an Idaho manufacturer of temperature sensors and assemblies, is proud to announce the receipt of an International Traffic in Arms Regulations (ITAR) registration from the Directorate of Defense Trade Controls (DDTC).

ITAR is a set of U.S. government regulations tightly controlling the export and import of defense related articles and services as defined by the United States Munitions List (USML). QTI is implementing a technology control plan which will keep ITAR-designated technical data, hardware, and defense services from being transmitted to any non U.S. Person or entity without proper export licenses.

With ITAR registration, QTI reaffirms its commitment to the military and aerospace market segments. Defense customers can be confident QTI will keep their technical data secure and complaint with all U.S. export control laws.


QTI Sensing Solutions Agrees To Acquire Cornerstone Sensors

BOISE, ID, December 19, 2011 – QTI Sensing Solutions, a privately held provider of temperature sensors including NTC/PTC Thermistors, RTDs and thermocouples for defense, aerospace, medical, refrigeration and HVAC, today announced that it has agreed to acquire southern California-based, Cornerstone Sensors. Terms of the transaction were not disclosed.

Founded in 1992, Cornerstone Sensors' management team combines over 100 years of successful experience in engineering, manufacturing, and assembling temperature sensors. This experience is offered to its customers in technical expertise, quality products, and cost-effective temperature solutions. The company has sales, manufacturing, engineering, and administrative facilities in southern California and a modern assembly facility in Mexico.

Cornerstone Sensors, Inc. manufactures precision NTC thermistors and thermistor assemblies for temperature measurement, control, indication, and compensation applications. Cornerstone Sensors' NTC thermistor technology offers a variety of product configurations to meet a multitude of design and engineering requirements. NTC thermistor products combined with a commitment to quality, customer service, and competitive prices are the foundations of the company.

"The acquisition of Cornerstone Sensors will strengthen our ongoing initiatives in the growing laboratory and medical markets. Additionally, it will enhance our manufacturing capabilities and allow us to respond even faster to our customer's requirements with a broader array of products," said Todd Ketlinski, QTI's President and CEO.

QTI completed the acquisition through the purchase of Cornerstone's Vista, California and Tecate, Baja California, Mexico operations which will begin business as QTI starting January 1, 2012. Former President of Cornerstone Sensors, Gregg Lavenuta, and former VP of Sales and Marketing, Dan McGuillicuddy, have agreed to stay on with QTI and will perform critical leadership functions as the company moves forward.