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Fiber Optic

Temperature Sensors (Fiber Optic) | Model FP4700

  • Model FP4700 Fiber Optic Temperature Sensor.
  • Model FP4700 Fiber Optic Temperature Sensor components and dimensions.
Model FP4700

The Model FP4700 Fiber Optic Temperature Sensors are designed for use in environments where high levels of electrical interference exist or where intrinsic safety is an issue. The FP4700 uses the temperature-dependent birefringence of a specially selected crystal as the temperature transduction mechanism. This crystal does not show thermal creep or aging as with some other fiber optic sensors.


Temperature Range¹
−40°C to +250°C
Response Time
1.5 s typical
Operating Humidity Range
Length × Diameter
50 × 4.8 mm (sensor)

¹The available operating range is dependent on cable type (please contact GEOKON. with temperature parameters).

²Total accuracy over the full range including both signal conditioner and sensor errors. Higher accuracy available on request.

Please Note: GEOKON maintains an ongoing policy of design review and reserves the right to amend products and specifications without notice. Various instruments are discontinued over time and replaced with new, updated models.