... 2.Level control, alarm, and fault interlocking VRUQK - 6000/6100 Displacer Level Switches and UQK – 6200 series Displacer level ... switchVRUQK - 6000/6100 Float Level Switches and UQK – 6200 Displacer level switches ... switch movement precisely even under rugged conditions.VRUQK - 6000/6100 Float Level Switches are applicable for level control, alarm, ...