Dwyer Instruments L4 Magnetic Float Switch

The Dwyer Instruments L4 Magnetic Float Switch is a dependable liquid level sensor ideal for a variety of applications, including HVAC equipment. With a magnetically activated switching mechanism and a stainless steel body, it has a sturdy construction. The L4 float switch operates on a free-swinging float and a permanent magnet contained within the body, in contrast to other float switches that employ bellows or springs. The float rises and draws the magnet as the liquid level in the tank rises, activating a snap switch as a result. This simple design minimizes possible failure spots such as leaks or blockages, resulting in long-term functioning. The L4 Magnetic Float Switch is used in HVAC systems to operate sump pumps, condensate drains, and humidifiers.