8290-189
May 26, 2026

8290-189

Product Overview Woodward 8290‑189 is a high‑precision variable‑reluctance magnetic pickup (speed sensor) widely used with Woodward governors, overspeed protection devices, MicroNet, 2301A, ProTech series controls. It detects rotational speed of turbines, diesel/gas engines, compressors and generators by sensing gear‑tooth pulses, providing frequency‑based speed feedback signal for speed regulation, load control and overspeed protection.

Description

Key Features

  1. Passive variable‑reluctance sensor, no external power required

  2. High‑output signal amplitude, strong anti‑interference for industrial vibration environments

  3. Standard thread mounting, easy gap adjustment to gear teeth

  4. Rugged stainless‑steel housing, oil‑proof, corrosion‑resistant

  5. Directly compatible with Woodward 2301A, 505, ProTech‑GII, MicroNet controllers

Electrical & Mechanical Specifications

  • Sensor Type: Variable‑Reluctance Magnetic Pickup

  • Thread Size: 5/8‑18 UNF‑2A

  • Sensing Range: 0–25 000 Hz

  • Output Signal: AC sine‑wave voltage proportional to speed

  • Recommended Air Gap: 0.25–1.0 mm (0.010–0.040 inch)

  • Operating Temperature: −40 °C ~ +125 °C

  • Cable Length: Standard integrated cable

  • Housing Material: Stainless steel

  • Weight: ~150 g

  • Certifications: Class I Div 2 hazardous area approved

Typical Applications

  • Speed sensing for gas / steam turbines

  • Diesel & gas engine genset governor speed feedback

  • ProTech‑GII overspeed protection system sensor

  • Oil‑gas compressor and marine prime‑mover speed monitoring

  • MicroNet / Atlas control system rotational speed detection


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