Constant Level Lubricators with Low Level Safety Switches automatically maintain a fixed liquid level in a bearing housing or gear box using the liquid seal principle.  This lubricator features a low level safety switch that can be used to actuate warning devices or shut off a machine when lubricant levels become too low.  There is also a large sight for viewing the liquid level and condition.  The lubricator can be used on sleeve bearings, anti-friction bearings, gear boxes, pump housings, ventilating fans and blowers, moistening pads, and any other application demanding the maintenance of a constant liquid level.