Float switches that are configured to stay closed until liquid flips open the circuit, are referred to as a, “normally closed float switch.” Once liquid reaches a certain level it then forces the circuit open and activates the next step, which could be a power shut off, or alarm sound off.

2025年1月15日 · Normally open (NO) float switch: The electrical circuit within the switch remains open when the switch is at the bottom and closed in the ‘up’ position. So, the switch is open with gravity pulling it down and closes as the liquid level rises to the pre-set level.

Float Switch for Sump Pump - 10-Foot Water Level Sensor with Honeywell Microswitch and Adjustable Tether Length for Ground Water Bilge Pump and Water Tank – Non-Corrosive PP Casing, Rated to 13 Amps

A float switch, also known as a float sensor, works much like a standard light switch, they open and close contacts to control whether or not signal current can pass through. They are either Normally Closed, meaning current is flowing, or Normally Open, meaning the …

2015年4月21日 · When it comes to vertical float switches, units are commonly referred to as “Normally Open” or “Normally Closed,” meaning that specific liquid levels close or sever the electrical circuit. In both cases, a glass reed is sealed inside the float switch’s stem, with magnets mounted in an external float.

In this article, we’re going to review the basics of float switches. We’ll cover the difference between: Pump switches vs. control switches; Normally open vs. normally closed; Mechanical vs. mercury floats; Specialty floats; And the colored caps on select mechanical control switches; Let’s get started! Watch the YouTube Video Instead

A Pump Down Float Switch, also known as 'Normally Open', closes the circuit on the rise and is typically used to turn the pump off when the float is in the down position. So, a pump could be set to turn off when the water level in the storage tank reaches a predetermined low level.

Installing a "Normally Open" float switch with your pump will ensure the pump turns off before water in the tank is depleted, thus preventing the pump from ever running dry and burning up. Our Normally Open 120/230V Float Switch is a 13amp rated pump-duty switch with heavy duty contacts for maximum pump starting loads.

2012年2月13日 · Float Switch, Normally Open, 125/250VAC Brand: SJE Rhombus Price For: Each Float Material: Polypropylene Series: Signal Master Voltage: 125/250VAC Compliance: UL, CSA Max.

2020年6月16日 · Normally Open Mechanical Float Switch w/ 15 ft. Cord (115V, 13A) Specifications: Product Type: Switch; Voltage: 115v; Cord Length: 15' Product Type: Float Switch; Application: Accessory