Microbridge Tech Announces -55 to +230°C Operating Temperature Range Rejustors
Microbridge Technologies, Inc., a manufacturer of passive, analog precision calibration products (Rejustors), announced three new devices that extend the company’s reach into the high temperature, 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 well less than 1%.
The new Rejustors have no mechanical moving parts and are suitable 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. According to the company, these applications benefit from improved reliability, dependability, dust and moisture resistance over mechanical parts as well as from the lowest noise and widest bandwidth of any adjustable resistor technology available.
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 27KΩ Rejustors and offers a precision adjustment of < 0.1% while maintaining a +/- 2.5% tolerance over the entire operating temperature range of -55 to +230°C. Type II Rejustors are designed to offer superior resistance tolerances of +/- 0.7%, "tuned" for a narrower 50°C "window" or band within the high temperature operating range. MBH293-AS2, for example, has a pair of nominally 29KΩ Rejustors that can be acquired as a Type IIA, offering 0.7% tolerance between 150 and 200°C, or as a type IIB, offering the same 0.7% resistance tolerance over the 175 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 is typically complete within 1-2 seconds.
The MBH-273-AS1 Type I is priced at $6.95 for quantities of 1,000. The MBH-293-AS2 Type IIA is priced at $7.64 for 1,000 pieces while the MBH-293-AS2 Type IIB is priced at $8.34 for 1,000 pieces.
