Fullerton, Calif. TT electronics' BI Technologies Electronic Components Division has developed a new linear position sensor, based on the company's Model 400 series of precision potentiometer/position sensors, for the rudder pedal assembly adjuster of the F35 Joint Strike Fighter (JSF) aircraft. The new sensor provides redundant position outputs and is lower in weight than the non-contact sensors that it replaces.
The company said by advancing the current uses of conductive plastic potentiometric sensors, it displaced LVDTs as the sensing device in the left and right brakes of the JSF F35. The prime contractor is Lockheed Martin with subcontractor Pacific Scientific HTL/Kin-Tech Div.
The compact 0.5-in. stroke length linear sensor is used as the actual interface between the DC output and the hydraulic braking system, resulting in an effective "brake-by-wire" system. It features dual independent outputs and a long life of 5 million actuations. In addition, the sensor offers superior harsh environment characteristics based on several testing methods including being subjected to volcanic ash, which contains substances such as sulfur, fluoride and chloride salts/acids. The device has passed the Corrosion Resistance Test, at 336 hours SO2 salt/fog exposure test per ASTM G85.A4.
BI Technologies offers linear and rotary position sensors in a wide range of standard and custom resistance values from 10 ohms to 1Mohms. Standard resistance tolerance is 10%, with a minimum practical resistance tolerance of 1%. The dielectric strength is 1,000 Vrms with the minimum insulation resistance of 1,000 Mohms. The temperature coefficient is -800 ppm/°C. The operating temperature range is -55°C to 125°C.
Typical pricing for the 400 Series sensor starts at $360 each in quantities of 25. Delivery starts at 12 weeks and vary based on custom specifications.
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