Touch Lamp Repair 3 Way Touch Switch Sensor X 4 You'll receive Four 3 Way Touch Switch Sensors. Manufactured by OK Lighting and UL Approved. Sensor Comes with Detailed Replacement Instructions. This Sensor Creates 3-Way Light from Inexpensive 1-Way Bulbs. Each Sensor Measures 2 1/4" x 1 3/4" x 3/4".