Montreal, Canada Microbridge Technologies, Inc. has expanded its Rejustor family of adjustable resistors with the introduction of three new devices that offer a high operating temperature up to 230 degrees C, aimed at military/aerospace and energy exploration markets. Available in two basic types, the Rejustors target the need for precision and accuracy in extreme temperature environments and offer a lifetime drift of ess than 1%.
Each resistor element is independently electrically adjustable to any value from its nominal, down to 80% of nominal value. The MBH-273-AS1 (Type I Rejustor) is a pair of nominally 27 KΩ Rejustors and offers a precision adjustment of <0.1% while maintaining a +/- 2.5% tolerance over the entire operating temperature range of -55°C to +230°C.
Type II Rejustors are designed to offer resistance tolerances of +/- 0.7%, "tuned" for a narrower 50°C "window" or band within the high temperature operating range. The MBH293-AS2, for example, offers a pair of nominally 29 KΩ Rejustors that can be acquired as a Type IIA, offering 0.7% tolerance between 150°C and 200°C, or as a type IIB, offering the same 0.7% resistance tolerance over the 175°C to 225°C range.
HT-Rejustor dividers are temperature stable so that the ratio between the two resistors is predictable within +/-1% regardless of adjustment state of either HT-Rejustor, as long as both HT-Rejustors are at the same temperature. Precision resistance adjustment of each HT-Rejustor is accomplished by changing the physical properties of the resistor under control of Rejustor Calibration tools and Rejust-it software. The adjustment process takes about 1-2 seconds.
The Rejustors have no mechanical moving parts and are well-suited for vibration sensitive applications such as calibrating electronics for jet engine monitoring instruments, voltage regulators, downhole drilling, military, furnace and boiler, strain gauge and vibration sensors.
Pricing: The MBH-273-AS1 Type I is priced at $6.95; the MBH-293-AS2 Type IIA at $7.64 and the MBH-293-AS2 Type IIB at $8.34, all at quantities of 1,000.
Product information: Rejustors
Microbridge Technologies, www.mbridgetech.com