Madison M4500 Liquid Level Miniature Switch 1/8 Thread Spst

Product Description

The MADISON M4500 is a miniature liquid level switch designed for float-based level detection in tanks and reservoirs containing general-purpose fluids, gasoline, or oil. The switch features a 1/8 inch threaded connection, SPST logic, and a brass and Buna-N body construction that resists exposure to petroleum-based fluids. Rated to 150 psi maximum and 105 degrees F maximum operating temperature, the M4500 handles a range of light-duty industrial and commercial fluid monitoring applications. With a 1 inch float diameter and a float specific gravity of 0.45, it is sized for compact installations where space and weight are critical factors. Licensed technicians and maintenance professionals install this switch as part of fluid control and monitoring systems.

The M4500 is suited for residential, commercial, and light industrial applications where liquid level monitoring of gasoline, oil, or general-purpose fluids is required. Its compact form factor and miniature switch design make it appropriate for tight equipment bays, small tanks, and equipment panels. Typical installation scenarios include fuel tanks, oil reservoirs, and fluid containment systems where a reliable SPST float switch is needed to trigger a circuit at a set fluid level.

Key Features

• SPST switch logic for straightforward open or closed circuit level control
• Brass and Buna-N body construction provides compatibility with gasoline and oil service
• 1/8 inch threaded connection for direct tank or reservoir mounting
• Rated to 150 psi maximum operating pressure
• 1 inch float diameter with 0.45 float specific gravity for compact installations
• Dual voltage compatibility at 120 volts AC and 240 volts AC

Compatibility

Designed as an OEM-style replacement or direct-install miniature liquid level switch for general-purpose, gasoline, and oil fluid monitoring systems requiring a 1/8 inch threaded SPST float switch.

Installation Notes

Installation is typically performed by licensed electricians or qualified maintenance technicians. Shut off all power to the circuit and depressurize the tank or reservoir before removing or installing the switch. Verify that the fluid media and operating pressure do not exceed the rated limits of 150 psi and 105 degrees F before commissioning. Follow all applicable NEC guidelines for the electrical connections associated with this switch.