Speed Sensors

Magnetic speed sensors rely on the characteristics of a change in magnetic flux to sense the rotational speed of a given target. They are typically used to monitor gear tooth (or target) speed in various applications. Norwich Aero manufactures variable reluctance (VR) style speed sensors. This type of sensor is typically self-generating, meaning it requires no external power. When a ferrous target is passed in close proximity to the sensor face, a small voltage is “induced“ into the sensing coils due to the change in magnetic flux. Presently all of the commercialized speed sensors manufactured by Norwich Aero use this principle. These sensors are used to detect gas turbine fan speed (called N1), core speed (called N2), helicopter rotor speed, and other rotational sensing duties, such as anti-lock brake systems.
Application Specification: Helicopter Rotor Speed Fan Speed (N1) Power Turbine / Core Speed (N2) Air Turbine Starter Rotor Azimuth Propeller Synchronization Air Management Systems Customer Specific		Technical: Typical Temperature Range: -54°C to 260°C Configuration: Thread or Flange Mount, Special Schematic: Single, Dual , or Triple Coil Special Durability: Severe Environment Resistant Design

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