Store › GP-1u: Temperature Sensor Image 1 of 1 GP-1u: Temperature Sensor $50.00 A small fast response sensor for finger temperature. Includes 1 thermistor bead sensor, for GP-4e & GP-8e only. Quantity: Add To Cart Added! A small fast response sensor for finger temperature. Includes 1 thermistor bead sensor, for GP-4e & GP-8e only.