Manufacturer of Float Switch

A float switch mounts inside an oil reservoir and rises or falls with the oil level. At a fixed set point the float changes the switch contact state, giving an electrical low-level signal without needing any power supply of its own, the switching action is driven purely by the float's mechanical position, so there is no calibration to set during installation.

Because it has no moving electronics and no wear-prone contacts in the liquid path, a float switch is a low-maintenance, drop-in way to add a low-oil alarm or pump cut-out to a reservoir. SP Engineers manufactures float switches at our ISO 9001:2015 certified works in Faridabad, India, for use on our own motorized lubrication units.

In centralized lubrication systems, the float switch is mounted inside the oil reservoir and monitors the lubricant level. When the oil drops below the minimum level set point, the float descends and the switch contact changes state, triggering a low-level alarm on the machine control panel or stopping the pump to prevent it running dry.

Running a lubrication pump with an empty or near-empty reservoir causes the pump to cavitate, wear rapidly, and fail, and leaves all lubrication points starved of oil. The float switch is a simple, reliable safeguard that prevents this. SP Engineers supplies both horizontal (FSH) and vertical (FSV) float switch configurations to suit different reservoir geometries. It is always used alongside a pressure switch in a complete motorized lubrication unit.

• Motorized Lubrication Unit: the pump unit the float switch protects
• Pressure Switch: monitors system pressure alongside the float switch
• Electronic Timer: controls pump cycle intervals
• Electronic Controller: advanced control with alarm outputs for both switches
• Oil Level Gauge: visual oil level indication to complement the float switch