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VFR Bulk Metal® Foil Resistors Tackle Extreme Temperature Swings on Mars in New Demo Video
MALVERN, Pa. — May 05, 2014 — VPG (NYSE: VPG) today announced that its Vishay Foil Resistors brand (VFR) has released a new video demonstrating the advantages of using Bulk Metal® Foil resistors for applications operating in extreme temperatures. The video compares the TCR performance and resistance stability of Bulk Metal Foil with thick film and thin film technologies when exposed to the temperature conditions on Mars.
Most resistors perform well in controlled, room-temperature environments. However, there are some applications that operate under temperature conditions requiring optimal TCR performance and resistance stability, such as weather stations in the South Pole, solar panel arrays in Death Valley, and the harshest environment of all: space. To illustrate this, the video released today, hosted by Richard Zuratt, senior R&D engineer at VPG, features a lab demonstration replicating the daily temperature cycle on Mars.
For the demonstration, a Kelvin scanner and precision DMM record the TCR and change in resistance of thick film, thin film, and Bulk Metal Foil 1206 1 K Ω resistors when moved from room-temperature water (+23 °C) to dry ice (-50 °C) to boiling water (+100 °C) — and then back to room temperature again. While the thick film and thin film devices demonstrate poor TCR performance and a significant change in resistance after exposure, the Bulk Metal Foil resistor maintains a low TCR and experiences and a near-zero resistance change after exposure to these extreme temperatures.
"VFR resistors are hardly affected at all by the temperature swings encountered on a typical day on Mars," said Yuval Hernik, senior director of application engineering for VFR. "Thin film and thick film technologies, on the other hand, not only offer worse performance, but a single temperature cycle changes their resistance permanently. Imagine what would happen to these resistors after an extended stay aboard the Rover Curiosity. That’s why Mars needs Bulk Metal Foil resistors, as this video so dramatically shows."
Further information about Vishay Foil Resistors products is available at www.vishayfoilresistors.com. Follow Vishay Foil Resistors at http://twitter.com/foilresistor.
About VPG
VPG is an internationally recognized designer, manufacturer and marketer of: components based on its resistive foil technology; sensors; and sensor-based systems specializing in the growing markets of stress, force, weight, pressure, and current measurements. VPG is a market leader of Foil Technology Products, providing ongoing technology innovations in precision foil resistors and foil strain gages, which are the foundation of the company’s Force Sensors Products and its Weighing and Control Systems. The product portfolio consists of a variety of well-established brand names recognized for precision and quality in the marketplace. To learn more, visit VPG at www.vpgsensors.com.
About VPG Foil Resistors
VPG Foil Resistors produces the most precise and stable resistors available. Distinguished by the premier brands Vishay Foil Resistors, Powertron, and Alpha Electronics, the VPG Foil Resistors portfolio includes discrete resistors and resistor networks in surface mount and through-hole (fixed-lead) configurations; customized chip resistor networks; precision trimming potentiometers; and discrete chips for use in hybrid circuits. These devices are used in applications requiring a high degree of precision and stability, such as in medical testing equipment, semiconductor equipment, precision measuring instruments, aerospace, and military applications. To learn more, visit www.vishayfoilresistors.com.
Bulk Metal is a registered trademark of VPG.